ARP 200-8557 10-Pack Of Special Purpose Washers, 3/8" Inside Diameter, 3/4" Outside Diameter, .120" Thick Parallel-ground and hardened high performance washers Constructed from premium chrome moly and finished in black oxide Features an internal diameter chamfer 3/8" inside diameter, 3/4" outside diameter, and .120" thick Each package contains 10 washers