Material: Aluminum Alloy Adjusting Range: 115mm / 4.5in Load Capacity: Max 10kg / 22lb Item Weight: 292g / 10.3oz Package Size: 22 x 5.5 x 5cm / 8.7 x 2.2 x 2in Package Weight: 330g / 11.6oz Model Number: W-160 Aluminum 2-Way Macro Focusing Rail Slider Plate CNC machined from solid aircraft-grade aluminum Color: Black + Red Precision focusing over a 110mm range Index scales 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 precise camera-to-subject distance; the macro focusing rail provides fine-tuned control across an 115mm adjustment range Rail driven by a knob-controlled worm gear; index scales in millimeters printed on both sides for accuracy Camera mounts to the top of the rail 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 settings may cause slight color variations between the item in the photo and the actual product. Measurement may vary by +/- 1-3cm.