"This weathertight vent provides air circulation under both shrinkwrap and canvas covers. Water-resistant installs easily either horizontally or vertically, using 1-pc. pull tab that exposes over 15 sq. inches of adhesive. U.S.A. Assembly Required No, Dimensions L x W x H in. 4 x 5 x 1, Product Type Stretchwrap machine accessory. Includes UV additives for long life in all climates"
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