Milwaukee Twins Tank Grommet With Bushing For Harley Softail Milwaukee Twins Tank Grommet has a 1 diameter with a 5/8 inner diameter. The outer grommet is constructed from a polyurethane material that is heat and chemical resistant, and the center is a zinc plated bushing. Features: Polyurethane damper Zinc plated bushing 1 O.d. and 5/8 I.d. Sold in pairs Replaces OEM 11447 / 5775