Older tube trailers made of steel (Type I) usually carry about 100 kg (220 lb) per load, while new and more efficient composite trailers (Type IV) made of carbon fiber make it possible to carry up to 1 tonne (1.1 short tons; 0.98 long tons) per load.
[3] A trailer with 10 tubes and a 44-foot (13.41 m) chassis, operating with pressures in excess of 3,200 psi (220.6 bar; 22.1 MPa).
[4] As of 2012, the US Department of Transportation (DOT) started to award Special Permits (SP) to different manufactures to produce Type IV Hydrogen trailers in the US.
As in July 2016, Nishal Group has multiple cascade configurations in the form of cascade banks operating at 200 bar (20,000 kPa; 2,900 psi).
In February 2018, CATEC Gases was awarded DOT certification to produce a 1,000 kg (2,200 lb), 53 ft (16.2 m) hydrogen tube trailer operating at 275 bar (27,500 kPa; 3,990 psi).