This weld-in kit is made of 1-5/8 x .134" wall mild steel tubing. It includes a main hoop, cage sides, windshield brace, rear struts, side bars, four 6x6x1/8 inch mounting plates, eight 2-1/4 x 2-1/4 roll cage gussets, 1-1/4 OD back brace bar and subframe struts. Designed to fit hardtop or sedan cars, and trucks listed. Fits most cars with the stock interior installed. They are not designed to fit convertible cars. In most cases the top will not function and the rear bars will need to be placed where the top folds in. Customer is responsible for any necessary modifications if purchased for a convertible car. Bent rear struts to clear the rear seat are an available option (part no. 7011). This roll cage meets current NHRA requirements for cars with a 1/4 mile et of 8.50 or more. Swing-out side-bar kits (part nos. 7008, 7030, and 7036) are available separately. Rocker tubes, dash bar and helmet bar shown are available options. Includes drawing and instructions. OPTIONAL COMPONENTS IN BLUE