Alienation`s first 4 peice bar is built from straight gauge 4130 chromoly tubing for extra strength that has been post-welded heat treatedDeeply knurled 50 mm clamping area to prevent slipping19mm crossbar22.2mm29`8.75`3°12°BlackBMX4130 ChromolyUPC/EAN/GTIN: 888571077726