Made of high-quality aluminum, this part is specially designed for shock adjustment of 1/8 off-road vehicles.This 16mm shock spring long adjuster features an overall extension of 11 mm, allowing flexible adjustment of shock travel.Available in four colors: black, blue, red and purple. Equipped with O-rings for firm installation and enhanced durability.Two distinct markings are thoughtfully crafted on the semicircular section:1 laser line with groove, and 2 laser lines with groove. They help you precisely control the adjustment range, making it easy to tell a full turn or half turn at a glance. It enables hobbyists to fine-tune for ideal shock absorption performance effortlessly.Only compatible with 16mm shocks