Simple aluminum alloy stem. #6061-T6 Aluminum Alloy Forged Column Clamp Diameter: Φ1.1 inches (28.6 mm), Stack Height: 1.6 inches (40 mm), Weight: 4.9 oz (125 g) (60 mm), 4.6 oz (80 mm), 4.3 oz (135 g) (100 mm) Product color may differ from the actual product depending on your display type. Product specifications, logo design, etc. may be subject to change for product improvement. We also cannot answer measurements or personal fit that the manufacturer does not announce. Please be aware of