The design allows you to fit both a 5mm LED for the brake lights and a 3mm LED for the reverse lights. These light were designed to fit the Axial JK body and will also work with the officially licensed Smittybilt rear fenders (sold separately). The set comes as a pair (1 left 1 right). The parts come in a transparent high detail resin that will require painting. Shown painted using Tamiya acrylic clear red.