Specifications 1. Clear span Aluminium Tent. 2. 20*25m size, 4m side height. 3. Widely used for wedding, ... is 20m.2, The length of BT20 could be 20m, 25m, 30m and +5m more. 3, Frame uses hard pressed ... products have reached the standard of similar products in Europe. 6, The optional accessories are wooden floor, galss door, glass ... of the big tent): 12m, 15m, 18m, 20m, 21m, 25m, 30m, 40m, 50m and 60m.