CMR Adjustable Director's Field Monitor Cage and Camera Support. Monitors Up To 10" Wide and 8" Tall. The CMR adjustable support cage features lightweight anodized aluminum construction Adjustable height from Monitors up to 10 inches wide (outside dimension) can be mounted Twelve 1/4-20 threaded holes top and bottom for accessory attachment Requires the monitor to have bottom or top 1/4-20 mounting hole. Monitors up to 10" wide and 8" tall (Outside Dimension) Includes: Monitor support cage, 2 D rings, 2 Allen wrenchs.