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 4682 seat's 1.300" OD works well with our 26925, 26926 and 26526 valve springs in .570" guide applications. Category: Engine Components>Valve Springs, Retainers Core: N LTL: N MPN: 4682-16 Proposition 65: Y Special Order: Y