The Party tents are modular by design and may be increased or decreased in 3m/5m. The main frameworks (upright support and roof beam) are manufactured by hard pressed extruded aluminum. The sidewalls and roof covers are manufactured with 750g/m2 PVC-coated polyester textile flame retardant to DIN4102 B1, M2. The fabric is available in block-out or translucent. http://www.chinabigtent.com/