Product Description Specifications Made from hardened steel, these locators use an inboard locating shoulder to center the seat and hold the spring in place. The 4776 features a 1.550" OD and a .570" ID that works well with our 928, 944, 26089 and 955 springs. Category: Engine Components>Valve Springs, Retainers Core: N LTL: N MPN: 4776-16 Proposition 65: Y Special Order: Y