AL6061-T6 alloy quick-release seatpost clampStainless steel bushing ensures smooth lever actionAdjustment knob allows for on-the-fly fine-tuningRounded edges and floating bolt/ovalized hole design protects carbon frames and seatpostsØ28.6mm for Ø25.4mm seatpost and steel frameØ29.8mm for Ø27.2mm seatpost and chromoly frameØ31.8mm for Ø27.2mm seatpost and aluminum frameØ34.9mm for Ø30.9mm seatpost and aluminum frame, or Ø31.6mm seatpost and carbon frame16mm height29.8BlackAL6061-T6