Shade Tree 20' x 40' Heavy Duty Event, Party, Wedding Tent, Canopy, Carport, w/Sidewalls **IMPROVED** High quality galvanized steel framework with spring loaded locking balls Removable sidewalls with beautiful windows with lattice; and end walls with zippers for doorways High strength galvanized metal joint fittings Heavy Duty waterproof 180 gram polyethylene woven fabric canopy and sidewalls UV Protection - Blocks 90% of sun's rays