RSH10Q Quick Set Utility Shelf (For R8-R12 Carts)The RockNRoller RSH10Q Quick Set Utility Shelf is engineered to swiftly convert your R8, R10, & R12 carts into a mobile workstation. Constructed with a 0. 5" thick surface supported by steel tubes, the shelf is coated in heavy duty paint for durability. The surface measures 16" wide, and can be configured at a short 32" length or a full 50" length, to provide ample work space to accommodate a wide range of music, film, photo, video and other