Each BC06SPSS kit includes: 2 x Pistons (OD = 38.0 mm / Length = 22.0 mm) - 2 x Pressure Seal - 2 x Dust Seal - 2 x Joint O-Ring - 2 x Bleed Nipple - 2 x Bleed Nipple Cap - 2 x Copper Banjo 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.