A Guide to Choosing Blades Blade Specification Blade No. Dimensions (H x W x L) TPI (Teeth Per Inch) 3/0 0.21 x 0.60 x 130mm 30 2/0 0.25 x 0.58 x 130mm 30 0 0.28 x 0.65 x 130mm 28 1 0.30 x 0.77 x 130mm 25 2 0.32 x 0.85 x 130mm 23 3 0.34 x 0.80 x 130mm 20 4 0.36 x 0.96 x 130mm 17 5 0.39 x 1.03 x 130mm 17 6 0.42 x 1.10 x 130mm 14 8 0.46 x 1.35 x 130mm 14 10 0.50 x 1.60 x 130mm 13 12 0.55 x 1.80 x 130mm 13
