- Size: Approx 7cm(W) X 8cm(H) - Compatible with Gopro Hero 1/2/3. - Attach your GoPro camera to handlebars, seatposts, ski poles and more. - Fits 0.75" to 1.57" (1.9cm - ?4cm) diameter tubes. - You can also clamp to chainstays, small roll bars, bolt-heads, windsurfing and kite surfing control bars, or even use to create a handheld boom - any pole that is in the size range above. - We specialize in Electronics, Computer, Cell Phone Accessories & Cables Pickup Location: "Cable Link" Tel: 613-680-6188