Ridgid 73360 1620 6-Feet Fiberglass Extension Rule The product is 73360 RULE, 1620 6' FIBRGLAS EXT The product use for construction rulers This product manufacture by Switzerland Precision Made of Flexible Heavy-Duty Fiberglass with Embedded, Easy-to-Read Boldface Figures and Graduation with Red 16" Stud Marks No. 1602 is Graduated on One Side in Millimeters with Red Markings Every 10cm Reverse Side Reads in Inches 6' in Length 5/8" in Width