Holley Carb Carburetor 1/4-32 Main Jets set The aperture size is:60 61 62 63 64 65 66 67 68 69,10 sets in total, 2 pcs per size,Thread size: 1/4"-32 Fits Holley 2010,2300,4010,4011,4150,4160,4500

Size comparison table： 40 0.040" / 1.02 mm 41 0.041" / 1.04 mm 42 0.042" / 1.06 mm 43 0.043" / 1.09 mm 44 0.044" / 1.12 mm 45 0.045" / 1.14 mm 46 0.0465" / 1.18 mm 47 0.047" / 1.19mm 48 0.048" / 1.22 mm 49 0.049" / 1.24mm 50 0.0496" / 1.26mm 51 0.050" / 1.27 mm 52 0.051" / 1.30mm 53 0.052" / 1.32 mm 54 0.053" / 1.34 mm 55 0.054" / 1.37 mm 56 0.055" / 1.397mm 57 0.056" / 1.42mm 58 0.057" / 1.45mm 59 0.058" / 1.47 mm 60 0.059" / 1.50mm 61 0.060" / 1.52mm 62 0.061" / 1.55 mm 63 0.062" / 1.57 mm 64 0.064" / 1.63mm 65 0.065" / 1.65mm 66 0.066" / 1.67 mm 67 0.068" / 1.73mm 68 0.069" / 1.75mm 69 0.070" / 1.78 mm 70 0.073" / 1.85 mm 71 0.076" / 1.93 mm 72 0.077" / 1.95 mm 73 0.079" / 2.00 mm 74 0.081" / 2.06 mm 75 0.082" / 2.08 mm 76 0.084" / 2.13 mm 77 0.086" / 2.18 mm 78 0.087" / 2.20 mm 79 0.089" / 2.5mm 80 0.090" / 2.30 mm 81 0.092" / 2.33mm 82 0.094" / 2.39 mm 83 0.0975" / 2.48 mm 84 0.099"/2.51 mm 85 0.100" / 2.54 mm 86 0.101" / 2.57mm 87 0.103" / 2.62 mm 88 0.104" / 2.64 mm 89 0.1045" / 2.65 mm 90 0.1055" / 2.68mm 91 0.1085" / 2.76 mm 92 0.110" / 2.79 mm 93 0.112" / 2.84 mm 94 0.1155" / 2.93 mm 95 0.1165" /2.95mm 96 0.1195" /3.04 mm 97 0.121" / 3.07 mm 98 0.124" / 3.15 mm 99 0.125" / 3.18 mm 100 0.126" / 3.20 mm 101 0.127" / 3.22mm 102 0.128" / 3.25 mm 103 0.130" / 3.30 mm 104 0.134" / 3.40 mm 105 0.137" / 3.48 mm 106 0.141" / 3.58 mm 107 0.145" / 3.68 mm 108 0.147" / 3.73 mm 109 0.150" / 3.81 mm 110 0.156" / 3.96 mm

• This is a standard Holley Carburetor main jet kit, with thread sizes of 1/4 "-32 and jet hole sizes of 60,61,62,63,64,65,66,67,68,69.
• The quantity for each size is 2 pieces. You can get a total of 20 pieces.Made of brass and processed by CNC centers, the cumulative sales have exceeded tens of thousands of sets, and the product quality is trustworthy!
• 1/4"-32 UNF Unified Fine Thread
• If you need other sizes, please leave us a message after ordering, send an Amazon email, or contact the seller. The seller can then make the main jet according to your requested size and send it to you.
• We will provide you with excellent after-sales service. If you have any questions during the ordering process, you can contact us.