Four shelves instead of five leave taller gaps between levels, which suits a stockroom holding mixers, bulk containers or cases that will not slide under a tight 14 inch clearance. Each tier carries 330 lbs in stainless steel, giving the unit the same load rating as its five-shelf counterpart across fewer levels. Stainless construction handles humidity, grease and repeated cleaning without corroding, so the rack holds up in a commercial kitchen, a walk-in area, a garage or a workshop where painted steel starts to rust within a season. Shelf positions adjust along the uprights to match what is stored. The assembled unit weighs 44 lbs and ships flat with the hardware needed to bolt it together. Open shelving keeps contents visible at a glance rather than buried behind a cabinet door. Four shelves and the frame arrive flat packed with all fasteners in the carton.