• O-ring, 10 x 2.5mm - Viton, Part# 4070166
    O-ring, 10 x 2.5mm – Viton, Part# 4070166 – vacstellar $5.12

    10 in stock

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  • O-ring, 107.32 x 5.33mm - Viton, Part# 2106062 - vacstellar
    O-ring, 107.32 x 5.33mm – Viton, Part# 2106062 – vacstellar $7.60

    10 in stock

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  • O-Ring, 26.9 x 2.4 mm - Metal
    O-ring, 125 x 5 mm – Viton, Part# 23970419 $12.04

    This Viton O-Ring (Part #PL23970419) is a critical sealing component for your vacuum pump. It measures 125 mm (inner diameter) x 5 mm (cross section). Made from Viton, a high-performance synthetic rubber, this O-ring creates a tight, reliable seal. It prevents leaks and keeps your vacuum pressure strong.

    This O-ring is compatible with Pfeiffer and Leybold pump brands . It fits the Pfeiffer DUO 120A, DUO 125, DUO 250A, DUO 255M (Index C), UNO 250A and Leybold Ruvac WAU2000, WSU2000, WA2001, WAU2001, WS2001, WSU2001 pump models . If you are rebuilding your pump, this O-ring is a must-have part. In fact, it is included as a standard component in the Seal Kit for the DUO 120A (PSK024) and the Overhaul Kit for the DUO 125 (PMK025) .

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  • O-ring, 140 x 5 mm - Viton, Part# 48656700 - vacstellar
    O-ring, 140 x 5 mm – Viton, Part# 48656700 – vacstellar $17.28

    10 in stock

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  • O-ring, 15 x 2.5 mm - Viton, Part# 4070259 - vacstellar
    O-ring, 15 x 2.5 mm – Viton, Part# 4070259 – vacstellar $7.04

    10 in stock

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  • O-Ring, 26.9 x 2.4 mm - Metal
    O-ring, 18 x 2.0 mm – Viton, Part# 320177 $4.83

    This Viton O-Ring (Part #320177) is a critical sealing component for your Pfeiffer DUO vacuum pump. It measures 18 mm (inner diameter) x 2.0 mm (cross section). Made from Viton, a high-performance synthetic rubber, this O-ring creates a tight, reliable seal. It prevents leaks and keeps your vacuum pressure strong.

    This O-ring is designed specifically for the Pfeiffer DUO 125 and DUO 255M (Index C) pump models . If you are rebuilding your pump, this O-ring is a must-have part. In fact, it is included as a standard component in the Seal Kit for the DUO 125 (Part # PSK025) , where exactly one of these O-rings is used .

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  • O-Ring, 26.9 x 2.4 mm - Metal
    O-ring, 180 x 5 mm – Viton, Part# 320534 $37.10

    This Viton O-Ring (Part #320534) is a critical sealing component for your large Pfeiffer DUO vacuum pump . It measures 180 mm (inner diameter) x 5 mm (cross section). Made from Viton, a high-performance synthetic rubber, this O-ring creates a tight, reliable seal. It prevents leaks and keeps your vacuum pressure strong. This O-ring is designed specifically for the Pfeiffer DUO 255M (Index C) pump model . If you are rebuilding your large DUO pump, this O-ring is a must-have part. In fact, it is included as a standard component in the Seal Kit (Part # PSK028) and the Major Overhaul Kit (Part # PMK028) for this pump .

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  • O-ring, 19 x 2.5 mm - Viton, Part# 4070333 - vacstellar
    O-ring, 19 x 2.5 mm – Viton, Part# 4070333 – vacstellar $6.56

    10 in stock

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  • O-ring, 24 x 2.5mm - Viton, Part# 4070420 - vacstellar
    O-ring, 24 x 2.5mm – Viton, Part# 4070420 – vacstellar $5.12

    10 in stock

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  • O-Ring, 26.9 x 2.4 mm - Metal
    O-ring, 28 x 5 mm – Viton, Part# 02124025 $8.82

    This Viton O-Ring (Part #02124025) is a critical sealing component for your Pfeiffer vacuum pump. It measures 28 mm (inner diameter) x 5 mm (cross section) . Made from Viton, a high-performance synthetic rubber, this O-ring creates a tight, reliable seal. It prevents leaks and keeps your vacuum pressure strong.

    This O-ring is compatible with Pfeiffer DUO and UNO pump families . It fits the Pfeiffer DUO 120A, DUO 125, DUO 255M (Index C), DUO 10, DUO 10C, DUO 20, DUO 20C, and UNO 30M pump models . If you are rebuilding your pump, this O-ring is a must-have part. In fact, it is included as a standard component in the Seal Kit for the DUO 120A (PSK024) , the Seal Kit for the DUO 125 (PSK025) , and the Seal Kit for the DUO 255M (PSK028) .

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  • Placeholder
    O-ring, 32 x 2.5 mm – Viton, Part# 320524 $4.41

    This Viton O-Ring (Part #320524) is a critical sealing component for your Pfeiffer DUO vacuum pump . It measures 32 mm x 2.5 mm. Made from Viton, a high-performance synthetic rubber, this O-ring creates a tight, reliable seal. It prevents leaks and keeps your vacuum pressure strong. This O-ring is designed for the Pfeiffer DUO 120A, DUO 125, and DUO 255M (Index C) pump models . If you are rebuilding your pump, this O-ring is a must-have part. In fact, it is included as a standard component in the Seal Kit (Part # PSK024) for the DUO 120A .

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  • O-ring, 38 x 3.0mm - Viton, Part# 4070621 - vacstellar
    O-ring, 38 x 3.0mm – Viton, Part# 4070621 – vacstellar $5.52

    10 in stock

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  • O-Ring, 26.9 x 2.4 mm - Metal
    O-ring, 47 x 2.5 mm – Viton, Part# 320533 $5.25

    This Viton O-Ring (Part #320533) is a critical sealing component for your large Pfeiffer DUO vacuum pump . It measures 47 mm (inner diameter) x 2.5 mm (cross section). Made from Viton, a high-performance synthetic rubber, this O-ring creates a tight, reliable seal. It prevents leaks and keeps your vacuum pressure strong. This O-ring is designed specifically for the Pfeiffer DUO 255M (Index C) pump model . If you are rebuilding your large DUO pump, this O-ring is a must-have part.

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  • O-Ring, 26.9 x 2.4 mm - Metal
    O-ring, 500x 3 mm – Viton, Part# 320535 $33.60

    This Viton O-Ring (Part #320535) is a critical sealing component for your large Pfeiffer DUO vacuum pump . It measures a massive 500 mm (inner diameter) x 3 mm (cross section). Made from Viton, a high-performance synthetic rubber, this O-ring creates a tight, reliable seal. It prevents leaks and keeps your vacuum pressure strong. This O-ring is designed specifically for the Pfeiffer DUO 255M (Index C) pump model . If you are rebuilding your large DUO pump, this O-ring is a must-have part. In fact, it is included as a standard component in the Seal Kit (Part # PSK028) and the Major Overhaul Kit (Part # PMK028) for this pump .

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  • O-ring, 6 x 2.2 mm - Viton, Part# 4070088 - vacstellar
    O-ring, 6 x 2.2 mm – Viton, Part# 4070088 – vacstellar $4.24

    10 in stock

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  • O-ring, 8 x 2 mm - Viton, Part# PL23970149
    O-ring, 8 x 2 mm – Viton, Part# PL23970149 – vacstellar $5.36

    10 in stock

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  • O-ring, 85 X 5mm - Viton, Part# 320538 - vacstellar
    O-ring, 85 X 5mm – Viton, Part# 320538 – vacstellar $21.76

    10 in stock

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  • O-Ring, 26.9 x 2.4 mm - Metal
    O-Ring,Viton,65 X 5 MM Part# PL23970129 $8.33

    This Viton O-ring (Part# PL23970129) measures 65 mm inside diameter with a 5 mm cross-section. Made from Viton (FKM) , it offers excellent resistance to high heat, chemicals, oils, and fuels. It is commonly used in repair kits for Busch, Leybold, and Pfeiffer vacuum pumps  and is ideal for creating tight, reliable seals in harsh environments .

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