This listing is for a set of (8) Speed Pro Chevy 350 based engine Hypereutectic Flat Top w/ 4 valve reliefs pistons & matching Hastings or Perfect Circle Rings depending on availability at time of purchase and Lock ring clips for floating pins!!! Ring dimensions 5/64, 5/64, 3/16 Accommodates pressed or floating wrist pin installation. For use with 5.700" rod length.