Professional Portable Drafting Drawing Board 30' x 42' Adjustable Aluminum Parallel Straightedge Ergonomic Carry Handle with Fold-in Design Strong Durable Particle Board Substrate Smooth Warp-free White Melamine Laminated Board 0.12' Acrylic Blade with Inking Edges, 3/16' Clearance and Measurements in Inches and Centimeters Straightedge with Top-mounted Adjustment Knobs and Brake knobs on Each End for Locking. Rubber Grip Tracks Underside the Board 3' Folding Metal Legs with Rubber-dipped ends Composite Wood Particle board is CARB compliant Ships Fully Assembled and Double Boxed