SIZE L S mm in mm in 1/8" 6.3 0.25 17.3 0.68 1/4" 7 0.28 19.1 0.75 3/8" 7.5 0.3 25.3 1 1/2" 7.7 0.3 30.1 1.19 3/4" 9.2 0.36 34.4 1.35 1" 9 0.35 43.2 1.7 1-1/4" 11.7 0.46 52 2.05 1-1/2" 11.8 0.46 58.1 2.29 2" 13.1 0.52 71.9 2.83 2-1/2" 14.8 0.58 90.4 3.56 3" 17 0.67 103 4.06 4" 18 0.71 128 5.04