The Adjustable Laptop Utility Cart features a retractable shelf to hold a laptop. Color: Black. Material: Black powdered Steel. Number of shelves: 1. Wheel Type: none. Product Type: Accessory. GREENGUARD Indoor Air Quality Certified and GREENGUARD Children and Schools CertifiedSM. An optional second retractable shelf is also available to hold additional equipment. Adjusts in height from 26inch to 42inch . Frame is black powder-coated steel. Includes an electrical assembly with four outlets and a 25" cord, and 4inch casters (two locking)