This chassis is made using 7075-t6 AIRCRAFT ALUMINUM and has a natural tumbled finish to remove burrs. This chassis has been tested by some of the hardest bashing guy in the Industry to assure that it will stand up to the riggers of hard bashing. This is a modular design and allow you to adjust the amount of flex you wish to have by removing the center brace screws. As pictured the center bracing is 17 mm thick. the top center brace is 9 mm thick. We have also made some additional optional 6mm center braces to give you more tuning options. ASSEMBLY REQUIRED: stock chassis weight is 850 grams (1.87) lbs our pictured chassis is 1180 grams (2.601)lbs.