These Associated factory replacement 13x23mm shock bodies feature the FOX Kashima Coat anodized finish, a hard, low-friction surface treatment developed by FOX that reduces wear and improves shock shaft action. Sold as a pair, they are machined metal with fully threaded exteriors for collar-style ride-height adjustment. They are a direct replacement for Associated RC-10 B-series builds running this shock body size. Features: FOX Kashima Coat low-friction anodized finish 13x23mm shock body size Fully threaded exterior for ride-height collar adjustment Sold as a pair Metal construction 7/7/26 cs