This Kyosho factory replacement rear oil shock is designed for the Mini-Z MR-03 platform and features an aluminum body construction for improved durability and heat dissipation over the standard plastic unit. The kit includes the assembled shock with spring, along with a sprue of clip-style spring retainers, a screw, washer, and end cap to complete installation. The aluminum anodized cap allows for preload adjustment to fine-tune rear suspension feel. Features: Aluminum shock body replaces stock plastic unit Includes spring retainer clips, screw, washer, and end cap Adjustable preload via aluminum cap Designed for Kyosho Mini-Z MR-03 7/7/26 cs