2 ply dunnage air bags are paper bags constructed of 2 plies (layers) of paper or gauges of poly material in 5 different levels (L1, L2, L3, L4, and L5). They are designed with an inflatable internal Polyethylene Bladder and are an innovative and simple blocking and bracing tool.
Association of American Railroads (AAR) Approved - Constructed of 2 plies of 80lb extensible Kraft paper or equivalent, which meets or exceeds the requirements of Table C, Rule 40 of the Uniform Freight Code. Inner bladder constructed of 4 mil co-extruded polyethylene. Maximum inflated pressure to 3 psi. Production date is stamped on each unit.
Used in container and truck shipments for lighter loads, as with the 4 ply bag the load is secured by locking the last 2 or 4 palets from the door to the sides of the truck creating frictional drag.