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 / for KANGRINPOCHE / for / for / for MARSACE / ball head of Arca 39mm fit. Bottom with a starndard Arca-Swiss dovetail size:800mm, 600mm Material:aluminum colour:Black Package Contents: 1 x Metal Tripod Mount Ring Replacement Base IS-THRF680 Only the above package content, other products are not included. Note: Light 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. Features: 1. Made of Aviation Aluminum CNC precisely machined, hand-polished, anodized with non-slip rubber and 1/4inch stainless steel screw and spring; 3.Quick release plate is AS 39mm standard, compatible for / for / for KIRK / for / for MARKINS / for / for KANGRINPOCHE / for / for / for MARSACE / ball of Arca 39mm fit. 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;