The product is an OEM cylinder head O-ring for a Suzuki RM250 motorcycle from the years 1991 to 2000. The part number is 11147-28C20, and it is a genuine Suzuki replacement part. This O-ring is designed to provide a seal for the cylinder head, ensuring that the engine remains sealed and lubricated during operation. As an OEM part, it is made to the same specifications and quality standards as the original equipment on the motorcycle.