This is a quick release clamp style, convenient and useful. clamp size: 31.8 mm / 34.9mm.
Startbuymore Bike Quick Release Seat Post Clamp, M5 Aluminum Alloy Bicycle Clip Screw for Bike Scooter Easy Height Adjustment Lightweight Portable Black 5mm
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1 Pcs Bike Seat Post Clamp Aluminium Alloy, Bicycle Quick Release Seatpost Collar, Alloy Bicycle Quick Release SeatPost Collar, Black Quick Release Seat Tube Clamp 34.9mm
