2011 Aluminum Flexible Air Ducting Pipe For Hydroponics & Grow tent & Greenhouse 1.top quality,low price 2.prompt shipment 011 Aluminum Flexible Air Ducting Pipe For Hydroponics & Grow tent & GreenhouseSize optional ø102 mm*10 m, 4in*32.8 feet ø152 mm*10 m, 6in*32.8 feet ø203 mm*10 m, 8in*32.8 feet ø254 mm*10 m, 10in*32.8 feet ø305 mm*10 m, 12in*32.8 feet