Forged AL6061-T6 alloy construction 31.8mm clamp diameter 4-bolt faceplate 180mm long quill Matte finish with laser etched graphics ISO-Mountain safety certified Mountain Quill 22.2mm 110 31.8 25? Blk AL6061-T6 Matte 180mm 1`UPC/EAN/GTIN: 072774584284