【Aluminum seatpost clamp 32mm】 Item Dimensions LxWxH 4.72 x 4.33 x 0.79 inches. Forged Aluminum 6061 Quick release clamps. 32mm clamp suits for Frame Seat Tube 30.2mm – 32.1mm. GREEN, GOLD and Red symbolize the colos of leaves. Easy to adjust the seat height for uphill and downhill sections.