Durable and High Rebound Viton Material Bushings, Comes in 60A (soft) / 75A (medium) / 90A (hard) 3 hardness for your Preference. Designed to fit all Tuned Trucks, Works Perfectly on BRT / YT Workshop Tested. * K-Rings Package Includes: Hi-Grade Viton Bushings X 4 + Thick Washers X 4 (Use Just the Road Side Washer if you prefer Loose Trucks) 輪架用