More information100% designed, tested and manufactured in Barnoldswick, England Heavy duty carbon fiber construction with aircraft grade aluminum seat rail clamps Smooth internal surface finish eliminates any unnecessary resin rich areas to minimize weight Various wall sections for optimize weight and areas of high stress concentrationsAvailable in Ø27.2mm x 350mm, Ø30.9mm x 400mm and Ø31.6mm x 400mmWeights: 27.2 185 g // 30.9 and 31.6 220 g15 mm recoil