Product Description Specifications CNC-machined for consistency, these 7 degree lightweight tool steel retainers feature light weight, exceptional strength and wear characteristics. Fit engines with 1.250" O.D. valve springs such as our 980, 981 and 941 springs. Category: Engine Components>Valve Springs, Retainers Core: N LTL: N MPN: 1750-16 Proposition 65: Y Special Order: Y