Easy to assemble and storage, little assembly required. Heavy duty wheels with large treaded tires make it easy to maneuvering. Ergonomically shaped crank arm helps in rolling and unrolling the cover. Solar cover rolls up safely on a 3 1/4 diameter tube.Material: Stainless steel (frame) + aluminum (tube). Recommended use length: 13.7' ft - 16' ft long. Diameter of casters: 7.8. Diameter of hand wheel: 13. Thickness of tube: 1.1 mm. 1 x #5 hand wheel. The item "21' Heavy Duty Solar Swimming Pool Cover Reel Straps Caster Wheels Manual Roller" is in sale since Monday, April 16, 2018. This item is in the category "Home & Garden\Yard, Garden & Outdoor Living\Pools & Spas\Pool Equipment & Parts\Pool Covers & Rollers". The seller is "togiproducts" and is located in Multiple Warehouses. This item can be shipped to United States.