Product Description Specifications CNC-machined for consistency, this 10 degree lightweight tool steel retainer features light weight, exceptional strength and wear characteristics. Fits engines with 1.250" O.D. valve spring such as our 980, 981 and 941 springs. Category: Engine Components>Valve Springs, Retainers Core: N LTL: N MPN: 1750-1 Proposition 65: Y Special Order: Y