This piston ring set from Hastings is designed for use on various 1968-1986 Ford V8 engines. With a manufacturer part number of 5485030, this set includes 40 pieces of piston rings and is suitable for cylinder bore diameters of 4.050 inches. The material used to make these rings is multiple and the set weighs 1 lb. The set is brand new and has never been used before. It is ideal for anyone who needs to replace their old piston rings to improve the performance of their engine. The set is vintage-free and does not contain any performance parts. Purchase this product today and give your engine the upgrade it deserves. Exact item set is shown. This is a new open box set. It was opened but never installed. Original packaging is included but was damaged in storage. Bore (in.): 4.050 in. Bore (mm): 102.870mm Piston and Ring Oversize (in.): 0.030 in. Piston and Ring Oversize (mm): 0.75mm. Top Ring Thickness: 3/32 in. Second Ring Thickness: 5/64 in. Oil Ring Thickness: 3/16 in. No returns on installed items or partial sets. Made in the USA. Please review our business policies in our store for information regarding returns, shipping and warranties.