purchased from north american outdoor products from west haven ct, 800 524 9970 seen there product line at the big e fair in westspringfield mass this fall ordered a 14-14-30 round shelter for my 21 ft seaswirl with boat on the trailer it is about 28 ft long product is good and so far no problems have shelter out back with about 2 inches of peastone for flooring 2 12 inch vents on both ends for ventalation any more info please email me at
sss-1@msn.com shawn from ludlow mass