COMP Cams Valve Springs, Retainers 4678-16 ID Spring Locator Set of 16 - 1.285" OD, .805" ID, .135" Thickness Made from hardened steel, these locators use an inboard locating shoulder to center the seat and hold the spring in place. The 4678 seat's 1.285" OD works well with our 26918 beehive springs. COMP Cams Spring Seats .135 x .810 x .880 x 1.285 (set of 16)