Material: 6061-T6 Aluminum fully CNC machined
Sizes: 28.6mm (1-1/8″) I.D. (for most chromoly frames that 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)