Detailed Product Description Size: side height 4M, ridge height 7.4M, Clear-span width 21M, bay distance 3m; side height 4M, ridge height 8M, Clear-spanwidth 25M, bay distance 3m; side height 4M, ridge height 8.8M, Clear-span width 30M, bay distance 3mAlu. frame: 200x110x4mmFabric: 420DThe spare parts could be stong alu. or steel material, it depends customers ' request.Window: PVC