1) 19''standard width. 2) 9mm plywood covered with fireproof laminated outside 3) ... corners About the product1) 19'' standard width2) use 9mm plywood covered with fireproof laminated outside.3)Heavy duty ... light, LED par light, Aluminium truss, stage, flight case ect., Welcome to our website to get more informance: ... 13392490037Skype: alicehjtrussAll your inquiries are welcome! Standard Rack Case