Ratermann Manufacutring, Inc. carries lab type 4 liter through 50 liter dewars. Our industrial and medical tanks have a working pressure up to 500 PSI and range from 180 liter to 265 liter. These tanks are D.O.T rated for road transport (4L). Ratermann Manufacturing also offers a line of Arctic Fox mini bulk dewars for large storage from 1000 liter to 2000 liter stationary ASME approved and not intended for road transport.Need additional help? Call 800-264-7793 and we'll be happy to assist you find the Lab Dewars and Dewar Specimen Storage Tanks to meet your requirements.