2 piece, 31.8mm 4130 chromoly, tig welded construction with post weld heat treatingDeep knurled clamping area to prevent slipping with a thicker bar boreAvailable in gloss black or Chrome and 2 heights31.8mm28.35`8.25`2°6°Black4130 ChromolyUPC/EAN/GTIN: 888571115435