【Aluminum seatpost clamp 35mm】 Item Dimensions LxWxH 4.72 x 4.33 x 0.79 inches. Forged Aluminum 6061 Quick release clamps. 35mm clamp suits for Frame Seat Tube 33.5mm – 35.2mm. GREEN, GOLD and Red symbolize the colos of leaves. Easy to adjust the seat height for uphill and downhill sections.