ITEM NAME:Telephoto Zoom Lens Bracket w/ Quick Release Plate Quick-Loading Clip Description: A screw hole connected fast loading plate is about 27mm, three damping joints, foldable, retractable screw is about 30mm. Long plate holders adopts Arca-Swiss standard interface. Compatible with SWISS / KIRK / Wimberley / MARKINS / SUNWAYFOTO / -RRS / ARCAKangrinpoche / BENRO / SIRUI platform. Installed between long-focus lens and camera body, sharing the weight of the camera mount to protect long-focus lens and camera mount from damage, but also increase stability. Aluminum materials, CNC precision machining, surface oxidation treatment, wear-resistant. Specification: Material: Alloy Size: Approx.40x40mm/ 1.57 inch Package Includes: 1 Piece Long-Focus Lens Support Holder Note: Please allow 0.1-0.5 inch difference due to manual measurement.(1 inch=2.54cm) Due to the difference between different monitors, the picture may not reflect the actual color of the item. Please understand,Thank you..A screw hole connected fast loading plate is about 27mm, three damping joints, foldable, retractable screw is about 30mm. 1 Piece Long-Focus Lens Support Holder. Long plate holders adopts Arca-Swiss standard interface.