Machine description: 37100.0 lb GVWR, Spring Suspension, Air Brakes, 10.00R20 Tires, Aluminum Tank, 18 ft Pup, 3 in Camlock Fitting SELLING-IN-CANADA-MANITOBA-REGIONAL-EVENT-ONLY ; FOR MORE INFO CONTACT BRAD WERK- 639.994... more info about the 1977 Columbia AFFT 3600.