ChromLives Super Clamp w/1/4" and 3/8" Thread for Cameras, Lights, Umbrellas, Hooks, Shelves, Plate Glass, Cross Bars and More (Camera Bracket) Color: Black Material: Plastic Clamping diameter: 15.2 mm - 37 mm Compatible with: FOR GoPro Hero 1 / 2 /3 Package Content: 1 x Bicycle Handlebar / Seatpost Clamp 1 x 3 Way Pivot Arm