Fits Mercury/Mariner 4‑15 hp. 2 cycle outboard, the 4/5/6 4-Stroke, and the 8/9.9/15 hp. (323cc) with standard gearcase. Will allow for running at idle speeds. Priced individually, sold @ multiples of 5 Quicksilver Branded, Clamshell Package Point of Sale Packaged.