Features:1. Made of Aviation Aluminum CNC precisely machined, hand-polished, anodized surface with non-slip rubber and 1/4inch stainless steel screw and spring;2. Referring to the structure design, added the features of finger position and quick release plate, the volume is about 91mm x 38.5mm x 31mm, net weight is about 95g;3.Quick release plate is AS 39mm standard, compatible for RRS / for ARCA-SWISS / for KIRK / for WIMBERLEY / for MARKINS / for SUNWAYFOTO / for KANGRINPOCHE / for BENRO / for SIRUI / for MARSACE / ISHOOT ball head of Arca 39mm fit.Bottom with a starndard Arca-Swiss dovetailsize:800mm, 600mmMaterial:aluminumcolour:BlackPackage Contents:1 x Metal Tripod Mount Ring Replacement Base IS-THRF680Only the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.