COMP Cams Valve Seals 530-1 You no longer need three hands to adjust valves; you just need the right tool. COMP Cams EZ Valve Lash Wrench makes valve adjustment easier and quicker than ever. Constructed of 17-4 stainless steel, these wrenches are heat-treated and electro polished to a satin finish. 1 Black Viton Valve Seal for .425" Guide Size, 5/16" Valve Stem COMP Cams EZ Valve Lash Wrench, 5/8" Wrench with 3/16" and 7/32" T-Handles COMP Cams Valve Seal 5/16in Viton For .4