Each BC256MH kit includes: 1 x Piston - 1 x Return Spring - 1 x Main Seal - 1 Guide Seal - 1 x Gaitor Boot - 1 x Spacer - 2 x Copper Crush Washers - 1 x Pot of Red Rubber Grease ---- Red rubber grease is included to provide lubrication for assembly, protect from dry burn, and prevent swelling and hardening of rubber hydraulic component seals.