3803-12 Quantity: 12 Features: -Wall bag.-Helps keep your cover in place even during periods of high wind.-Fasten your cover"s cable through the rugged plastic grommets on the top of each bag.-Use one bag every 2-3 feet.-Conveniently placed, leak-proof valve that is easy to fill with a garden hose. Specifications: -Heavy-duty 16 gauge vinyl. Dimensions: -Depth: 12".