A Guide to Choosing Blades Blade Specification Blade No. Dimensions (H x W x L) TPI (Teeth Per Inch) 2/0 0.21 x 0.68 x 130mm 38 1 0.30 x 0.77 x 130mm 38 3 0.34 x 0.90 x 130mm 33 5 0.38 x 0.93 x 130mm 33 7 0.42 x 1.10 x 130mm 25 9 0.46 x 1.35 x 130mm 20 12 0.52 x 1.70 x 130mm 18
