Pro-Draft Parallel Straight Edge Board, 18" x 24" SKU - U-PEB1824B Size - 26.00" x 21.00" x 3.00" Smooth white scratch-proof melamine surface. Straightedge suitable for both ink and pencil. Locking knob secures vertical motion of straightedge. Large, easy to adjust knobs. Folding rubber tip legs and non-skid rubber feet. Lightweight and handle makes it easy to transport.