Knight Cobra Seatpost Clamp|Blue/28.6mm|Red/28.6mm|Black/28.6mm|Gold/28.6mm|Purple/28.6mm|Blue/31.8mm|Red/31.8mm|Black/31.8mm|Gold/31.8mm|Purple/31.8mm|Pink/31.8mm|Green/31.8mm|Aqua/31.8mm

Material:6061-T6 Aluminum fully CNC machinedSizes: 28.6mm (1-1/8") I.D. (for most chromoly framesthat use 1" seat posts) 31.8mm (1-1.4") I.D. (for most aluminum frames like Big Ripper, Big Flyer, Throne, Monster Quad, So Cal Flyer, Blocks Flyer)