150mm Full-Flexible Steel Rules with Millimeter Graduations Cat. No. EDP Length Width x Thickness Graduations Feature Remarks C330-150* 51329 150mm 12.7 x 0.4mm 30 – 1/2mm One Side; mm and 1/2mm on Reverse C330-150 W/SLC* 66882 With Standard Letter of Certification** 150mm Spring-Tempered Steel Rules with Millimeter Graduations Cat. No. EDP Length Width x Thickness Graduations Feature Remarks C635-150 52630 150mm 19 x 1.2mm 35 – mm and 1/2mm Both Sides C635-150 W/SLC 66893 With Standard Letter of Certification** C635E-150 55968 150mm 19 x 1.2mm 35E – mm and 1/2mm Both Sides; mm on Both Ends One Side End Graduations 635N-150 70164 150mm 4.8 x 1.2mm 35 – mm One Edge and 1/2mm One Edge on Reverse Narrow Rule, Regular Steel Finish C637-150 56049 150mm 19 x 1.2mm 37 – mm and 1/2mm Both Sides C637E-150 55969 150mm 19 x 1.2mm 37E – mm and 1/2mm Both Sides; mm on Both Ends One Side End Graduations 300mm Full-Flexible Steel Rules with Millimeter Graduations Cat. No. EDP Length Width x Thickness Graduations Feature Remarks C330-300* 51330 300mm 12.7 x 0.4mm 30 – 1/2mm One Side; mm and 1/2mm on Reverse C330-300 W/SLC* 66883 With Standard Letter of Certification** 300mm Semi-Flexible Steel Rules with Millimeter Graduations Cat. No. EDP Length Width x Thickness Graduations Feature Remarks C335S-300 56048 300mm 25.4 x 0.5mm 35 – mm and 1/2mm Both Sides 300mm Spring-Tempered Steel Rules with Millimeter Graduations Cat. No. EDP Length Width x Thickness Graduations Feature Remarks C635-300 52631 300mm 25.4 x 1.2mm 35 – mm and 1/2mm Both Sides C635-300 W/SLC 66894 With Standard Letter of Certification** 500mm Spring-Tempered Steel Rules with Millimeter Graduations Cat. No. EDP Length Width x Thickness Graduations Feature Remarks C635-500 52632 500mm 29 x 1.2mm 35 – mm and 1/2mm Both Sides 1000mm Spring-Tempered Steel Rules with Millimeter Graduations Cat. No. EDP Length Width x Thickness Graduations Feature Remarks C635-1000 52633 1000mm 32 x 1.2mm 35 – mm and 1/2mm Both Sides 1800mm Heavy Spring-Tempered Steel Rules with Millimeter Graduations Cat. No. EDP Length Width x Thickness Graduations Feature Remarks C635-1800MM 64299 1800mm 38 x 2.5mm 35 – mm and 1/2mm Both Sides ** Includes redemption card for Standard Letter of Certification (SLC). * Indicates rules with single row of millimeter figures (all rules under 25mm width). Rules without asterisk have double row of millimeter figures, and each edge represents the bottom edge reading left to right (rules 25mm and wider). Steel Rules with Millimeter Gradua tions 150-1800MM All rules furnished with Starrett satin chrome finish, except where noted. Additional sizes and variations available by special order. Rules include: • Full-Flexible • Semi-Flexible • Spring-Tempered • Heavy Spring-Tempered Steel Rules Catalog Number Legend Prefixes C Satin Chrome Finish Suffixes E End Graduations N Narrow-Type Rule S Semi-Flexible 294 P recision R ules , S traight E dges , P arallels