Aluminium Pool Roller & 7X4M Pool Cover Made of sturdy aluminium construction with full adjustability, this pool roller is suitable for pool with a width between 2.1-6m. Equipped with premium anodized aluminium alloy stands with plastic wheels for maximum portability and convenience. With an exclusive non-slip spinning wheel design to roll up pool covers for easy operation.This pool roller will help to keep the pool clean at all times with little effort. Made of premium low density polyethylene 400 Micron, this solar pool cover is extremely durable and can efficiently and effectively distributing the heat to the water. It allows sun heat to penetrate to the pool; increasing the temperature in the water as well as can significantly reducing water evaporation. Also, it helps in keeping the pool clean; reducing maintenance time and cost for filtration and pumping. Maintaining your swimming pool will no longer be expensive. Get the best of natural resources and save money on chemicals and water! What so special about the Blue Top with Silver Underside design It is especially designed for cooler climate countries, for instance, like Australia. The design allows the sun rays to penetrate to the pool easier and faster. Also, it helps in restoring more heat in the pool for a longer time. You can then decide to pay for the postage or cancel the order.