Order Includes: 1x Muffler Gasket. Compatible with Yamaha models: WR450F 2011. Part Number: 5PH-14714-00-00. Measurements: Inner Diameter 1.49" 38mm , Outer Diameter 1.92" 49mm , HEIGHT 1.33" 34mm. We strongly suggest comparing the posted picture to the unit(s) that needs to be replaced..
