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 Slider Plate CNC processed from solid aircraft-grade aluminum Color: black + red Precision focusing through a 110mm range Index Scale on both sides 48mm diameter metal thumbwheel with 1/4 inch-20 screw Arca-compatible 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 across a 115mm adjustment range Rail driven by a knob-controlled worm gear Index scales in millimeters printed on both sides of the rail Camera mounts on top via integrated 1/4 inch screw with 48mm-diameter thumbwheel for secure attachment Overall length: 214mm including adjustment knob Weight: 293g (10.3oz) Package List: 1 x Rail Slider Plate Note: Light and display differences may cause slight color variation between image and actual item Measurement error allowed within +/- 1-3cm