This is the Cylinder and Piston Assembly for the O. S. Max .15CV-X, .15LD-X, and the .15CV-M, and MX Series of Car and Boat Engines. FEATURES: Replaces worn cylinder and piston assemblies. Cylinder is constructed of brass with Nickel plating, piston is made of aluminum. YOU WILL RECEIVE: One Cylinder and one Piston for the O. S. Max .15CV-X, .15LD-X, and the .15CV-M and MX Engines. REQUIREMENTS: Disassembling engine and heating crankcase to remove old cylinder and piston assembly. Installing Cylinder so that alignment notch fits over pin on crankcase. JXS 1/21/02 ir/kh &