Features: ??Compatibility??This item fits for Floor Jack Piston seal in ID 0.88” ,OD 1.64” ,Thickness 0.48“.It is a universal part which is compatible on many brand of Floor Jacks Piston Rod. ??Fits for several models??It fits for models as followed??Model 2015, 2150, 328.12000, 328.12001, 328.12002, 328.12020, 328.12040, 328.12041, 328.12160, 328.12170, 71200, AM0226F, AM200F, AM200MF, TM200F, TM200MF, YM150M ??Function??Prevent liquid and small solid from leaking into piston, reduce the friction loss between sealing parts and generate necessary air pressure. .