This versatile component holds 2 canned drinks with insulated sleeves, 2 mugs, water bottles or binoculars. Interior Dimensions 3.625” (3” at the narrowest point) x 7.85”. Overall Height 3.95”. Includes UniClamp that fits a wide range of tubing diameters from 3/4" to 1 3/8". Also offers the option of bulkhead mount. Designed for permanent mounting.