6" 269P Engineers Scale Ruler 10 30 40 50 60 PPI Double Numbered 4 Bevel Scale

4 Bevel Flat Engineering 6" 269P model plastic scale double numbered reads left to right and right to left. Graduated 10, 20, 30, 40 50, 60 parts per inch. Four Bevel Flat Scales - high quality architects scales and engineers scale by Alvin. Perfect for Architectural & Engineering design the 260 series Alvin four-bevel scales are made of high impact white plastic. These scales are available in 6 inch and 12 inch lengths with printed graduations. Supplied in vinyl sheath.