Always the correct part
This is a GHEA Racing Products 15-20mm Ride Height Gauge. This new product from GHEA Racing Products is made from Swiss 7075-T6 aluminum and lightweight. Deisgned for simplicity, this new gauge ranges from 20 to 30mm in 1mm increments by twisting the can counter-clockwise. It's small design will allow you to measure the ride height perfectly everytime.