SolarRoofs.com manufactures Skyline® solar water heaters. The Skyline® Solar Collector models are the 10-01 and the 20-01. The main difference between the models is length and weight. The 10-01 is 6' long by 20" wide and weighs 19 pounds. The 20-01 is 12' long by 20" wide and weighs 38 pounds. Custom flow through and special application collectors are available but all are based on the 10-01 and 20-01 collectors. The efficient Skyline® collectors with commercial applications include self-bracing features, durability and have a 150 mph wind rating.