Competition Engineering C3181 Roll Cage X-Brace Kit Welding is required Designed to increase the strength of chassis by eliminating side to side twist and uneven suspension loading Works in conjunction with the rear struts in roll bar and roll cage kits to create a solid racing chassis Comes with one 60 inch long 1-5/8 inch x 0.134 inch wall tube and two 30 inch long 1-5/8 inch x 0.134 inch wall tubes.