Ultimate Arms Gear Gunsmith & Armorer's Cleaning Work Tool Bench Gun Mat For The Mossberg 500 - 505 - 535 - 590 - 835 Shotgun Large exploded view schematics diagram of gun and parts list : 12" x 36" Neoprene rubber backing prevents fluids from penetrating through to work surface Soft polyester top protects gun and parts from scratches Diagram and Parts Description. Black Mat Imprinted with Exploded View