DESCRIPTION 1981 Endrby-Anderson NH3 Transport Trailer (JN0248, Unit 13606), 1980 Trinity 10,500 gallon NH3 tank, Blackmer pump, Head THK. .250", Shell THK. .392", O.D. 82.784", Length 40'-7 5/8", National Board #58, S/N 432911, tandem axle, spring suspension, 11R22.5 tires. Notes: Sub frame cracks, many issues.