High-quality:Made of high-quality aluminium alloy and sturdy carbon steel screws, ensuring that the clamps are lightweight but incredibly strong, with stable performance and long service life. Multiple size options: 31.8mm clamp for 30.2mm-32.1mm,34.9mm clamp for 33.5mm-35.2mm seatposts to suit most bikes in this size range. Simple installation: just put the bicycle seatpost clamp on the seatpost and tighten the bolt, then you can quickly adjust the seat without any complicated steps and complicated tools. Adjustable Seat: Bicycle seatpost clamp can help you quickly adjust the seat, can let you ride at a comfortable height, very time-saving, improve the riding experience Wide range of applications: can be used on road bikes, mountain bikes, folding bikes and all other bikes, very versatile and easy to use, Weight: 0.1763698096 Pounds, Manufacturer: Crozgan