Used with marks but straight.
Bike Seat Post Clamp,Black Aluminum Alloy Seatpost Clamp Quick Release Seatpost Clamp Bicycle Quick Release Seatpost Bicycle Mounting Tube Fittings for Road & Mountain Bikes (31.8mm)
Teyssor Bike Seatpost 25.4/27.2/28.6/30.9/31.6mm Bicycle Seat Post Aluminium Alloy Seatpost for Mountain Bike Road Bike BMX
Bikes Seat Post Clamp, Quick Release Seatpost Collar Aluminium Alloy Seatpost Tube Tightener Clip for 30mm/1.2in Pipe Mountain Road Bikes (1)
Mountain Bike Seatpost, Adjustable Lightweight Comfort Aluminium Alloy Seatpost 30.9x400mm for Road Cycling BMX Commuters Trail Riders
Keenso Bicycle Seatpost Clamp Quick Release 28.6mm Seat Post Clamp Aluminum Alloy Seatpost Seat Post Clamp for 25.4mm Seat Post(Silver) Riding
