Material: Aluminium alloy 6061 CNC Colour: black/blue/red/titanium/gold (optional)   Model M01: packaged in an opp bag 58g without spanner Product [with packaging] Size: 9.5 * 8 * 1.5cm Weight: 43g / 1.52oz Package weight: 46g/1.64oz   Model C: with packaging weight 40g with an L-shaped spanner Product size: 55*83*16mm Applicable installation pipe diameter: 19-40mm Specifications: This water bottle cage holder is robust and mounts to a 24mm or 31.6mm seatpost or 31.8mm handlebar with a hinged mounting bracket. Made from AL 6061 CNC for a good finish, sturdiness, lightness and durability. Mounted on 24mm or 31.6mm seatpost or 31.8mm handlebars via hinged mounting brackets. bracket swivels 90 degrees to suit the mounting position. Supplied with bolts. Package Included: bike water bottle cage conversion seat*1