... : 12,15m, 18m, 20m, 21m, 25m, 30m, 40m.2) Length: no limite, extended by 3m or 5m.3) Bay distance:3m ... or 5m4) Eave height: 3m or 4m2. FRAME PART1) The main parts are made of aluminum alloy and ... /sq.m to 850g/sq.m.4. OPTIONAL ACCESSORY1) Sidewall with clear pvc window. 2) Rain gutter 3) solid wall, such ...