High-quality boat dock floats made in the USA with an expanded polystyrene (EPS) foam interior. Plastic dock floats from Diversified Plastics, Inc. are durable, high-quality floats that are ideal for new and existing dock systems. Our boat dock floats have a flat top with molded-in mounting slots for easy attachment to any dock framework, whether wood, steel, or aluminum. They are a one-piece rotationally molded part, which eliminates seams that could result in separation and leakage. The .150″ nominal thick shell is made of extra strong virgin polyethylene containing ultraviolet inhibitors. This tough shell helps prevent damage from the sun, salt water, fresh water, debris, oil, gas, and marine organisms.