... PVC cover Max span width 40m, lenght is unlimited Outdoor Big tent for exhibition eventHigh Reinforce Aluminum, anti-rust surface, ... channelsDouble PVC-Coated Polyester, flame retardant, UV resistance, waterproof, comply to DIN 4102 B1, M2 ( European standard ), max wind speed ... allowance: 80km/hGround Fixed style :1> Expantion screws : Be used on the ground which can be ...