Material: Aluminum Model: NNR-140 Screw Thread: UNC 1/4"-20 Size: Approx. 17 x 37 x 14cm / 6.69 x 14.6 x 5.5 inches Jaw can be opened from 40mm to 45mm It is widely used with fisheye lenses and wide-angle lenses Safety stop relief grooves help protect your camera from accidental drops Machined from lightweight aircraft-grade aluminum, resistant to corrosion and abrasion Features two safety stop screws on the back of the plate Standard dual dovetail design with a high-contrast built-in bubble level for improved alignment Scales on both sides of the rail allow convenient and accurate adjustment of the nodal point Clamp with screw knob helps you lock equipment quickly Designed to accurately find the nodal point, ideal for panoramic photography Includes 8 UNC 1/4" screw threads for extended functionality Package Included: 1 x 140mm Nodal Slide Rail Quick Release Plate Note: Lighting and monitor display may cause slight color differences between the image and the actual item. Measurement may vary by +/- 1-3cm.