The Renthal Twinwall motocross handlebar features a patented tube within a tube design borrowed from aircraft design principles to achieve the highest strength possible in a moto handlebar. The outer tube is made from 7010 T73 aluminum, which has extreme good resistance to mechanical damage and is anodized to prevent corrosion, and the inner tube is manufactured from an ultra high strength 7010 T6 aluminum which is hard anodized. Twinwall's superior design construction allows it to withstand the hardest hits and biggest get offs without compromise, making it a popular choice to for championship contending athletes worldwide. Every Twinwall comes with a Renthal injection molded foam bar pad. Renthal Bend# 991, KTM SX/SX-F 09-12 Suzi RM/RMZ 06-13 Yam YZ-F 18-21 Dimensions - Width/Dim A: 806mm; Height/Dim B: 85mm; Rise/Dim C: 51mm; Clamping Width/Dim D: 125mm; Sweep/Dim E: 56mm; Control Length/Dim F: 200mm; Mounting Diameter: 1 1/8"/28.6mm.