【Function】 Prevent liquid and small solid from leaking into piston, reduce the friction loss between sealing parts and generate necessary air pressure. 【Fits 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.
