One of the strongest bases on the market, the Pro Shed Base is made using the highest quality recycled plastic with a load capacity of 180 tonnes metre squared (180000kg). The base is well ventilated & even the fixing pins & packaging are made from recycled materials. All of the kits are delivered with a free heavy duty weed membrane. Product comes delivered in 15kg parcels. Bases are available in a large number of sizes, ranging from 3ft x 6ft to 20ft x 10ft (see size option).