1.19" frame 2.Optional accessories (cantilever shelf ,cable management,wire manager, drawer flat YF-DK-2 Open Rack1. Assembling ... according to requirement, such as wire slot, wire rack, cantalever plate, drawing and pulling work platform,etc.3 ... . 2 pc 19" frame, be welded by 2mm thickness steel,punched both ... DIN41494; PART7 ,GB/ T3047.2-92 YF-DK-2 Open Rack