1. 20m big circus tent 2. with tempered glass walls 3. used party, ... 1, Attached photo shows a tent erected in Mexico, 20m width big tent with 2pcs 1/2 20m Decagonal tent as ends ... tent looks very elegant and beautiful.2, The clear-span width of BT20 is 20m, the length of BT20 could be ... workshop.8, Sizes available (the clear-span widths of the big party tent): 10m, 12m, 15m, 18m, 20m, 25m, 30m, 40m ...