This is a used, high quality, Okamura Computer Monitor Arm that clamps to the back of a desk. It has the standard (VESA100) 100 x 100mm screw hole monitor spacing on the powder coated mounting bracket. It can easily handle large monitors 22lbs or less. It is a Okamura G-Free model 8SA11B. Mountable desk top thickness: up to 1-7/8 inches (47.4mm). It has a channel to contain and hide wires and you can tighten nuts to hold it in place It is 27 inches long and can reach out a maximum 17.5 inches from the back of a desk. Well made in Tokyo of heavy powder coated steel with a weight of 11.5 lbs. Max monitor mounting: 15 inches from bottom monitor mounting holes to monitor bottom; 3 pitch levels, top and bottom tilt. Supports up to 22 lbs. If you see this ad it is still available.