Forged AL6061-T6 alloy construction 25.4mm clamp diameter 2-bolt faceplate 180mm long quill Matte finish with laser etched graphics ISO-Mountain safety certified Mountain Quill 25.4mm 90 25.4 25? Blk AL6061-T6 Matte 180mm 1-1/8`UPC/EAN/GTIN: 072774585618