Electomania Flexible Easy Zoom Focusing Adjustable Gear Ring Belt Hand for DSLR Camera (Black) Description: Small and light, easy installation to camera lens  follow focus at DSLR Rig System Facilitate adjustment, easy zooming / focusing Can be applied as focus lever +zoom lever with another lever  Gear ring included, more facilitated to control the follow focus and camera lens Scale lever included, fix it on the camera lens, you can read the angle the lever you adjusted there  Specification:  Color: Black & Blue  Size: approx 13.5*7.5*1cm  Material: Plastic  Package Includes: 1x Focusing Lever Gear Ring+ scale