Seamless, UV-resistant black polyethylene shell filled with EPS foam. The tough outer shell resists impacts and protects the foam core from saltwater, gasoline and most chemicals. Thick mounting flange can be drilled to accommodate attachment fasteners for easy mounting to any dock design. Constructed with ventilation holes that let air in and keep water out. Note: Not designed to attach to each other. Made in the USA Made from 50% recycled polyethylene 24" x 48" x 16"H, 600 lbs floatation | Dock Float Black 24"x48"x16"