Nsf Certified 4-Shelf Wire Shelving Kit With Casters, 48w X 18d X 72h, Black AnthraciteOpen design allows air circulation and reduces dust build-up.Up to 600 lbs. per shelf (evenly distributed) when used without casters.Casters (2 locking) provide mobility and can be omitted to increase weight capacity of unit. WARNING: This product can expose you to Di(2-ethylhexyl)phthalate (DEHP), which is known to the State of California to cause Cancer and Birth Defect/Reproductive Harm. For more information go to www.P65Warnings.ca.gov. - Cancer:Di(2-ethylhexyl)phthalate (DEHP);;Birth Defect/Reproductive Harm:Di(2-ethylhexyl)phthalate (DEHP)