Attwood 11401-4 Pontoon Winter Storage Block, Set of 4;

Discover hassle-free storage with our lightweight and extra-strong pontoon blocks. Designed with special features for added stability and convenience, each storage block can hold up to 3,000 pounds. The bottom has a molded-in texture to ensure maximum grip on concrete or ground surfaces, while the pre-drilled holes make fastening or staking easy. Ergonomic hand-holds make carrying more comfortable. Drainage channels and holes prevent water from pooling against your pontoon. 13-1/2" x 13-1/2" x 9-1/2".