Our W42AE carts are fully adjustable from 26" to 42" high. Their shelves are made from durable 20 gauge steel and the legs are constructed from thick 14 gauge steel. This cart of 1,000 uses easily rolls over tile, carpet, cement and hardwood floors utilizing it's 4" Silent-Roll ball bearing casters. Included with every W42AE is a non-slip rubber mat for the top shelf and three cable management straps. The UL listed model (W42ABEUL20) also includes our 8" Big Wheel Kit and our tip-resistant ballast system.