Top shelf is solid textured surface - great for equipment.The three 18”D x 24”W shelves have a 1/4” safety retaining lip and a raised texture surface to enhance product placement and ensure minimal sliding.Constructed from an engineered thermoplastic resin, injection molded, that will not chip, warp, crack, rust, or peel. Shelves and legs are made from recyclable material.Dimensions: Height - 34", Width - 24", Depth - 18" 4”Silent-Roll, full swivel, ball bearing casters, max. weight rated at 125 lbs. each.Carts will hold 200 lbs. of evenly distributed weight.