Rotation Molded Polyethylene Dock Floatation with Expanded Poly Styrene Foam Filling.
Buoyancy 327 lb in Fresh water
A vent plug is included and needs to be installed before use.
For orders of 6 or more, you may want to call for a bulk shipping rate. Pallet shipping needs to go to a commercial location with a fork lift or loading dock unless you pay extra for a delivery truck with a lift gate. Shipping locations need to be trailer truck accessible. (no camp roads)
Otherwise, UPS ground is the best shipping method for these items.