The DMR Grab CNC Seat Clamp in size 30.2mm is a high-quality aluminium seatpost clamp designed for universal, mountain, and BMX bikes. The sleek blue colour adds a stylish touch to your bike, while the durable construction ensures a secure and stable hold on your seatpost. This set includes one clamp and is the perfect component to enhance your cycling experience with a smooth and reliable seat adjustment. bought for my sons bike but got wrong size. never used.