Aluminum Alloy Bicycle Seatpost Clamp 31.8mm Seat Tube Clamp MTB Bike Seat Tube Clip Bike Parts Bike Saddle Seat Clamp Features: *1. Aluminum alloy material with T6 heat treatment, lightweight, high in strength and fine workmanship. *2. CNC numerical control integrated turning and fine cutting ensures precise fit, and the anodized surface is resistant to corrosion and rust after long-time use. *3. Quick release and adjustment, with high-strength nylon gasket to avoid crushing and scratching the seat post. *4. Available in 2 sizes and 5 colors to choose from, suitable for old-fashioned steel frame bikes, fixed gear, mountain bikes and road bikes. Description: *1. Material: aluminum alloy *2. Process: CNC turning +T6 hardening treatment+sanding process+anodic oxidation treatment *3. Dimensions: 64*46*16 mm *4. Weight: about 39 g *5. Seatpost Size: 27.2/28.6 mm outer diameter(31.8mm), 30.4/30.8/30.9/31.6 mm outer diameter(34.9mm) Package Includes: 1 x Seatpost Clamp