Aluminum 12" Imperial 3/32 3/16 1/8 1/4 3/8 1/2 3/4 1 1+1/2 3 Inch to Foot Architect Triangular Scale Ruler Aluminium Rule in a Box 30cm US American Standard Aluminum 12" Imperial Inch to Foot Architect Triangular Scale Ruler Scale 3/32 3/16 1/8 1/4 3/8 1/2 3/4 1 1+1/2 3 inches to the foot Length: 30cm 12" Made of silver aluminium with black letters and silver, green and red coloured slots. High quality item supplied in rigid transparent plastic case.