DESCRIPTION 1977 Lubbock NH3 Transport Trailer (JN0249, Unit 11379), 1977 Lubbock 9,600 gallon NH3 transport trailer, Blackmer pump, Shell THK. .357", Head THK. .250", O.A.L. 504, O.D. 77.7, tandem axle, spring suspension, 11R22.5 tires, National Board #3719. Notes: This trailer has frame issues and thin spots in tank.