Roll cart fits inside Docker Locker for safe storage. Electrical knockouts and vented back panels allow use of chargers and mini-refrigerators. Model KRL 7018 is 29,139 cu in. and measures 24.06 x 29.03 x 57.01 in.; Model KRL1018 is 31,642 cu in. and measures 24.06 x 29.03 x 62.38 in. Locker can mount on side of Series KRL 1000/7000 roll cabs.