The oil seals part number is TC440x490x25 FKM / FPM - Viton and This oil seal has the following Dimensions: 440*490*25 mm
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RMT25X450SAT Airtac RMT Rodless Magnetic Air Cylinder, Guided- RMT25X450SAT Miniature Deep Groove Ball Bearings The oil seals part numberRMT25X450SAT Airtac RMT Rodless Magnetic Air Cylinder, Guided RMT25X450SAT Rodless pneumatic cylinder, magnetic, guided, 25mm Bore, 450mm Stroke, with magnet, 2 Shock absorbers, NPT thread type Product Info Acting Type Double Acting Airtac rmt Guided Rodless Magnetic Air Cylinder Product Series Airtac RMT Rodless Magnetic Air Cylinder Guided Bore Size 25mm Brand Airtac Component Type Rodless Pneumatic Cylinder Magnet With Magnet Stroke Length 450mm