The DSLR Camera Vixen-Style Dovetail Assembly from Explore Scientific is created from high-pressure injection die-cast aluminum for structural integrity and has a black anodized finish to resist scratches and abrasions. This V-block is 11" long and 1.77" wide and features a laser-etched scale in 2mm increments on one side to help you quickly determine the balance point when placing the camera on the mount head. The opposite side features a stainless steel strip to protect the dovetail casting when securing it to the mount head.