This is a flex strap mount for Contour cameras. Made for a multitude of bar shapes from down tubes to boom tubes. The soft flexible strap holds steady and dampens vibration to assure you get clear crisp HD images. Utilises the popular rotating flat surface mount so that you can get any angle that you need. – Fits bars 20mm to 70mm – Comes with two strap sizes – 9” long and a 5.25” short strap for small diameters