Adjustable vertical height (60mm) support bracket with two rubber washers to protect the finish off of your lens from wearing. The diameter range of the lens works from 50mm to 140mm.
The spacing between the 15mm holes fits standard pieces of equipment.There are thumb screw and wingnut on both of the holes, you can tighten this on both rails.
There are 1/4 and 3/8 thread placements which are versatile. Mount a Monitor or teleprompter on your cinema rig when it's on a tripod/slider.
Made of black anodized aluminum, light but durability for long life operation.