Arrma Kraton®/Outcast® 4S 15mm Bore Pre-Assembled Shock Set (2) (132mm)#330721 The Arrma Kraton Outcast 4S 15mm Bore Pre Assembled Shock Set includes a pair of pre assembled aluminum big bore shock absorbers filled with high quality silicone shock oil, designed for quick and efficient shock replacement. It features anodized aluminum shock bodies, tough molded shock caps, and durable 4mm stainless steel shock shafts. The set also includes composite shock rod ends, spring retainers, and pivot balls, along with smooth