This is the Pfeiffer Part# PSK025 Seal Kit for the DUO 125 (Index B) and DUO 125M vacuum pumps . This comprehensive kit includes O-rings, gaskets, springs, a sight glass, a hydraulic piston, a coupling, and more . Designed specifically for the DUO 125 series, this kit provides everything you need to restore the sealing integrity of your pump during routine maintenance.
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