Made of high-strength, lightweight ABS plastic, the BOG(TM) Binocular Rest fits most binocular brands ranging in size from 7x to 20x. Includes a 3/8"-16 thread and 1/4"-20 size bushing and a SwitcherooA(R) System stem for mounting BOG(TM) platforms. Size: approximately 3 1/4" deep x 6" wide x 3/4" tall.