Crane's Rugged Steel Valve Spring Retainers Are Made From High-Quality Steel Bar Stock. They Are Heat-Treated For Maximum Strength and Durability, and Black Oxide Coated For Corrosion Resistance. They Feature a 7 Degree Taper, and They Are Compatible With Either Crane's Stamped Valve Stem Locks Or Their Machined Steel Locks.Pit Stop USA offers Crane Cams 7° Steel Valve Spring Retainers (16) - 11/32" Valve Stem Diameter - 1.250" O.D., .607" I.D. 99915-16 at low everyday prices. Be sure to check out all of our products from Crane Cams including Crane Cams 7 Degree Steel Valve Spring Retainers.