UTI Refrigerated Pup Trailer. 1997 model. Very good running Thermo King refrigeration unit. 19 foot UTI refrigerated pup trailer length. Lighted trailer with a good glean inside condition. The refrigerated pup trailer has a 13′ 6″ locking R.O.P. ramp and a roll up door that is 7′ wide and 7′ 3″ high. The trailer has a GVRW of 37’000 lbs.