Product Description Specifications Precision machined from chromemoly steel then black oxided, these 7 degree retainers are designed specifically for 11/32" valve engines with 1.437"-1.500" outer diameter valve springs like our 982, 990, 972, 901, 988 and 950 springs. Category: Engine Components>Valve Springs, Retainers Core: N LTL: N MPN: 743-16 Proposition 65: Y Special Order: Y