This product is a 27mm diaphragm carburetor membrane designed for specific scooter models. It is compatible with the following models: Kilibre 300 4T E2 2002 Skyliner 125 4T E2 2003-2006 Skyliner 180 4T E2 2003 Skyliner 250 4T E1 2000-2003 Skyliner 250 4T E1 1997-1999 It is also compatible with OEM part numbers 4HC-14340-00 and R18440431A0. Please ensure that this part matches your vehicle specifications before ordering. If there are any uncertainties, it is recommended to verify your model or engine details for compatibility. Compatibility Disclaimer: This is an aftermarket replacement part. Any brand names or model designations mentioned are used solely for the purpose of demonstrating compatibility.