Code of Federal Regulations Title 49. Transportation § 49.178.519 Standards for plastic film bags

(1) Bags must be made of a suitable plastic material. The strength of the material used and the construction of the bag must be appropriate to the capacity and the intended use of the bag. Joints and closures must be capable of withstanding pressures and impacts liable to occur under normal conditions of transportation.

(2) Maximum net mass:  50 kg (110 pounds).