This Associated factory replacement 13mm shock collar and seal retainer set keeps your shocks properly sealed and adjusted. The set includes both knurled aluminum collars and rubber O-ring seals for a complete service. Made from black anodized aluminum, the knurled collars provide a secure grip for spring preload adjustments. Designed for Associated 13mm shock bodies used across the B6, B7, T6, and SC6 platform vehicles. Features: 13mm shock collar and seal retainer set Black anodized aluminum construction Knurled collars for easy spring preload adjustment Includes O-ring seals for complete shock service 7/7/26 cs