Hubkraft 2 Ton / Tonne Trolley Jack U-Cup Seal + O-Ring. May also be suitable for the DUCO DMA 2000 Trolley Jack. This U-Cup Seal & O-Ring is for the Plunger / Piston / Handle Pump. You are buying the U-Cup Seal + O-Ring (2pcs total), where the o-ring is positioned inside the cylinder, and not on the piston plunger.
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