This group of photos is model TM51-35EB4. This trailer tower is a tandem axle model and has electric brakes on all 4 wheels (EB4) as standard equipment. It can handle generators up to 7.5 kW, fuel tanks, and radio equipment cabinets which are available as options from Aluma. The towers available for this unit are 50 ft., 75 ft. and 100 ft., from heavy duty to extreme duty models.