Material: Aluminum Alloy Adjusting Range: 115mm / 4.5in Load: max. 10kg / 22lb Item Weight: 292g / 10.3oz Package Size: 22 * 5.5 * 5cm / 8.7 * 2.2 * 2in Package Weight: 330g / 11.6oz Model Number: W-160 Aluminum 2-Way Macro Focusing Rail Plate Constructed from solid aluminum Color: black + red Precision focusing through a 110mm range Scale on both sides 48mm diameter metal thumbwheel with 1/4 inch-20 screw Compatible with 55mm dovetail plate with 1/4 inch-20 threaded socket Helps achieve exact camera-to-subject distance; the macro focusing rail provides fine-tuned control over a 115mm adjustment range Rail features knob-controlled gear mechanism; scales in millimeters are printed on both sides for consistency Camera mounts on top of the rail via integrated 1/4 inch screw with 48mm-diameter thumbwheel to secure camera in place Overall length: 214mm (including adjustment knob) Weight: 293g (10.3oz) Package List: 1 x Rail Plate Only the above package content, other items not included Note: Lighting and different displays may cause slight color variations compared to the actual item Measurement allowance: +/- 1-3cm