The velbon angle adapter 4 is designed to be used between a ball socket head and the velbon v4 boom arm it enables easy adjustment of the head to any angle in order to allow perfect positioning of the camera body features adjustable and lockable rotation of head and pedestal pedestal diameter 40mm dimensions 475 x 65 x 46mm hxwxd compatible with 14 or 38 heads fits almost any tripod or head additional information box contents angle adapter 14 38 adapter velbon screw tool