DESCRIPTION 1977 Lubbock NH3 Transport Trailer (JN0251, Unit 19072), 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 #3722, S/N 59472 Notes: This trailer has frame issues and thin spots in tank.