19mm Rod Clamp to Cold Shoe Mount has a standard cold shoe on top and a 19mm rod opening on the bottom. Great for attaching microphone mounts, wireless receivers, Canon LCD units, and more to a single rod. Specifications: Weight: 136 g (0.3 lbs) Dimensions: 50.8 x 25.4 x 50.8 mm ( 2 x 1 x 2 in)