- With black heavy duty cup washers - Polyurethane material is harder than stock rubber - Prevents the ''loose feel'' in the handlebars but still provides adequate vibration dampening - A must when installing Apehangers or other large bars with a lot of leverage- Eliminates flex while isolating vibration - Proprietary polyurethane bushings are specially made to reduce vibration as well as add a more positive and rigid feel to your handlebar - Heavy duty cup washers will not bend or distort like factory units - Each kit includes polyurethane bushings; inner steel sleeves and heavy duty cup washers