These heavy duty art tables come with full pre-welded apron. The apron is heavy duty 1" x 2", 14 gauge with 7 gauge welded corner brackets. All legs are easily attached at each corner with 2 tamper proof bolts. Frame color is black with chrome adjustable guides on legs. Art tables are available in Powder Coated MDF or Plastic Laminate. Powder Coating offers Heavy Duty Powder Coating with an excellent writing surface. Top is Durable, Stain and Scratch Resistant. Quality 1-1?4" Thick MDF. Laminate Top offers heavy duty high pressure surface on 1-1?8" Thick, 45 lb. high density particle board with T-Molding edge. Rounded corners for safety and comfort. Art Tables can be made mobile by adding the mobile casters to your selection. All tables come in 6 colors. The available 6 colors are: -R (Red), -Y (Yellow), -B (Blue), -OW (Off White), -T (Tan) or -G (Green). Laminate Tables come in the above 6 colors or -OK (Oak) and -WT (Walnut).