Alvin professional drafting triangle. Quality 8" drawing triangle is constructed of molded polystyrene plastic 0.10" thick, with double-beveled inking edges and double-beveled center cut-out finger lifts. Popular drafting triangle's fluorescent light has an illuminating effect on the drawing by accentuating the triangle's edge. Supplied in poly bag with hanging hole. Alvin professional 30x60 degree fluorescent orange inking drafting triangles are made in the USA.