All plastic 12" scale features high quality fine engraved markings on a buff color plastic scale. Calibrated Architect, open divided 3/32, 3/16, 1/8, 1/4, 3/8, 1/2, 3/4, 1, 1-1/2 and 3 inches to the foot. Full Divided: 16 parts to the inch. Made in Japan.