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"-20 screw Arca-compatible 55mm dovetail plate with 1/4"-20 threaded socket Helps achieve precise camera-to-subject distance Focusing rail provides fine-tuned control across a 115mm adjustment range Driven by a knob-controlled worm gear Index scales in millimeters printed on both sides for accuracy Camera mounts to the top via integrated 1/4" screw with 48mm-diameter thumbwheel 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 variation between the image and the actual item. Measurement may vary by +/- 1-3cm.