Manufactured by Includes one compression ring Sold per piston. If you are replacing rings on more than one piston please change quantity in the listing Rings are interchangeable with OEM pistons unless noted Ring is for standard bore size – 54.00mm Compatible with Honda models below: 2004 – 2007 CR125R Compatible with Kawasaki models below: 1998 – 2005 KX125 Compatible with Suzuki models below: 1989 – 2003 RM125 2004 – 2007 RM125 (will not work on OEM piston) Compatible with Yamaha models below: 1997 – 2014 YZ125 (will not work on OEM piston)