AST Half Cage Removable 4-point V1 rear cage to the body, bolted to 4 reinforcement plates welded to the body The reinforcement plates are made of 3 mm thick steel and are designed and manufactured specifically for each car, ensuring maximum safety and fit with the chassis. safety is supplied welded and unpainted and consists of a main rim with a diameter of 45 mm in E355 steel, the rest of the structure is made of E355 steel with a diameter of 40 mm. The structure is divided into many sections to allow easier installation in the vehicle & nbsp