Product Details A High Quality Slave Cylinder Rebuild Kit from All Balls. Kit includes everything required to rebuild a slave cylinder. Don’t buy a new Slave cylinder rebuild yours and save lots!
The main o ring to fit the plunger is a c- cup or u shape and is 2.5mm wide as measured by Trans Seal ( oil seal suppliers ) and will Not fit the 2mm groove in the plunger, hence all I have is a gasket for my money.