Material: Aluminum AlloyAdjusting Range: 115mm / 4.5inLoad: max. 10kg / 22lbItem Model Number:W-160 Aluminum 2-Way Macro Focusing Rail Plate processing from solid - aluminumColor: black + redPrecision focusing through a 110mm range Scale on both sides48mm diameter metal thumbwheel with 1/4 inch-20 Screw./ compatible 55mm dovetail plate w 1/4 inch-20 threaded socket. Helping to achieve exacting camera-to-subject distance, the Macro Focusing Rail is a focusing stage offering fine- tuned control a 115mm adjustment rangeThe Rail is by a knob-controlled gear and scales, in millimeters, are printed on both sides of the rail for consistency..Cameras can be mounted on top of the rail via the integrated 1/4 inch screw, which uses a 48mm-diameter thumbwheel to cameras in place. 214mm overall length (including adjustment knob). Package includes:1 * Rail PlateOnly the above package content, other are not included. Note: 1. Please allow some errors due to manual measurement. Please make sure you don't mind before bidding. 2. Due to different monitors, colors may vary, please understand. Hello, please pay attention to your shipping address when purchasing products. If your delivery information (such as name, street, house number, doorbell/box without name, etc.) is incorrect, the order will not be delivered correctly. )