Features: Precision CNC machined aluminum, it is lightweight and oxidation resisting. With special slot design, this plate can be used with other photographic equipment, in order to improve the shooting level. Suitable for macro photography of many traditional SLR cameras and DSLR cameras. Easy-recognized engraved scale on both sides of the rail to adjust the nodal point conveniently and accurately. Lightweight design of the quick release clamp with knob, compatible with AS quick release plate, such as for ARCA-SWISS, RRS, KIRK, MARKINS, SUNWAYFOTO, etc. Specification: Item Model: FNR-140 140mm Material: Aluminium Alloy Color: Black Weight: 169g Screw Hole: 1/4" inch Screw Hole Size: Approx. 38 * 171mm / 1.49 * 6.73inch Package List: 1 * Quick Release Plate Package List 1Precision CNC machined aluminum, it is lightweight and oxidation resisting. 2With special slot design, this plate can be used with other photographic equipment, in order to improve the shooting level. 3Suitable for macro photography of many traditional SLR cameras and DSLR cameras. 4Easy-recognized engraved scale on both sides of the rail to adjust the nodal point conveniently and accurately. 5Lightweight design of the quick release clamp with knob, compatible with AS quick release plate, such as for ARCA-SWISS, RRS, KIRK, MARKINS, SUNWAYFOTO, etc.