Uxcell a11122600ux0541 Hydraulic Oil Seal Product Name : Hydraulic Oil Seal;Model : USI Material : PU;Inner Diameter : 18mm/ 0.71" External Diameter : 26mm/1.02";Thickness : 5mm/ 0.197" Color : Beige;Weight : 2g Package Content : 1 x Hydraulic Oil Seal