Desmond 120mm Nodal Slide DNR 120 Double Macro Rail and Clamp Arca Compatible Desmond brand Arca compatible nodal slide rail With double Arca dovetails and Arca compatible clamp Precison made rail; ideal for panoramic photography Compatible with all Arca-style clamps including the RRS lever clamps All-metal construction Features a bubble level and precision decimal scale Includes 1/4" hex screw, 2x safety screws and 2x allen wrenches Dimensions: 140 x 38mm; Upper dovetail length: 67mm; Lower dovetail length: 120mm; Height: 16mm (not including jaws Weight: 121g