Product Description Specifications Constructed from hardened steel alloy, COMP's locator cups handle high RPM and extreme spring pressures while holding the spring. Our 4708 locator features a 1.780" OD with a .640" ID that works with 947, 948, 26082 and 26028 springs. Category: Engine Components>Valve Springs, Retainers Core: N LTL: N MPN: 4708-16 Proposition 65: Y Special Order: Y