Luer Tips

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Needle wire gauge information from Wikipedia

Color code information gathered from various sources.

Needle Nominal outer diameter Nominal inner diameter Nominal wall thickness Color
Gauge inches mm tol. inches (mm) inches mm tol. inches (mm) inches mm tol. inches (mm) (standard)
7 0.180 4.572 ±0.001 (±0.025) 0.150 3.810 ±0.003 (±0.076) 0.015 0.381 ±0.001 (±0.025)
8 0.165 4.191 ±0.001 (±0.025) 0.135 3.429 ±0.003 (±0.076) 0.015 0.381 ±0.001 (±0.025)
9 0.148 3.759 ±0.001 (±0.025) 0.118 2.997 ±0.003 (±0.076) 0.015 0.381 ±0.001 (±0.025)
10 0.134 3.404 ±0.001 (±0.025) 0.106 2.692 ±0.003 (±0.076) 0.014 0.356 ±0.001 (±0.025)
11 0.120 3.048 ±0.001 (±0.025) 0.094 2.388 ±0.003 (±0.076) 0.013 0.330 ±0.001 (±0.025)
12 0.109 2.769 ±0.001 (±0.025) 0.085 2.159 ±0.003 (±0.076) 0.012 0.305 ±0.001 (±0.025)
13 0.095 2.413 ±0.001 (±0.025) 0.071 1.803 ±0.003 (±0.076) 0.012 0.305 ±0.001 (±0.025)
14 0.083 2.108 ±0.001 (±0.025) 0.063 1.600 ±0.003 (±0.076) 0.01 0.254 ±0.001 (±0.025) 14: Dark Green
15 0.072 1.829 ±0.0005 (±0.013) 0.054 1.372 ±0.0015 (±0.038) 0.009 0.229 ±0.0005 (±0.013) 15: Orange
16 0.065 1.651 ±0.0005 (±0.013) 0.047 1.194 ±0.0015 (±0.038) 0.009 0.229 ±0.0005 (±0.013) 16: Purple
17 0.058 1.473 ±0.0005 (±0.013) 0.042 1.067 ±0.0015 (±0.038) 0.008 0.203 ±0.0005 (±0.013) 17: White
18 0.050 1.270 ±0.0005 (±0.013) 0.033 0.838 ±0.0015 (±0.038) 0.0085 0.216 ±0.0005 (±0.013) 18: Pink
19 0.042 1.067 ±0.0005 (±0.013) 0.027 0.686 ±0.0015 (±0.038) 0.0075 0.191 ±0.0005 (±0.013) 19: Brown
20 0.03575 0.9081 ±0.00025 (±0.0064) 0.02375 0.603 ±0.00075 (±0.019) 0.006 0.1524 ±0.00025 (±0.0064) 20: Yellow
21 0.03225 0.8192 ±0.00025 (±0.0064) 0.02025 0.514 ±0.00075 (±0.019) 0.006 0.1524 ±0.00025 (±0.0064) 21: Light Green
22 0.02825 0.7176 ±0.00025 (±0.0064) 0.01625 0.413 ±0.00075 (±0.019) 0.006 0.1524 ±0.00025 (±0.0064) 22: Black
22s 0.02825 0.7176 ±0.00025 (±0.0064) 0.006 0.152 ±0.00075 (±0.019) 0.0111 0.2826 ±0.00025 (±0.0064)
23 0.02525 0.6414 ±0.00025 (±0.0064) 0.01325 0.337 ±0.00075 (±0.019) 0.006 0.1524 ±0.00025 (±0.0064) 23: Light Blue
24 0.02225 0.5652 ±0.00025 (±0.0064) 0.01225 0.311 ±0.00075 (±0.019) 0.005 0.1270 ±0.00025 (±0.0064) 24: Red
25 0.02025 0.5144 ±0.00025 (±0.0064) 0.01025 0.260 ±0.00075 (±0.019) 0.005 0.1270 ±0.00025 (±0.0064) 25: Dark Blue
26 0.01825 0.4636 ±0.00025 (±0.0064) 0.01025 0.260 ±0.00075 (±0.019) 0.004 0.1016 ±0.00025 (±0.0064) 26: Beige
26s 0.01865 0.4737 ±0.00025 (±0.0064) 0.005 0.127 ±0.00075 (±0.019) 0.0068 0.1734 ±0.00025 (±0.0064)
27 0.01625 0.4128 ±0.00025 (±0.0064) 0.00825 0.210 ±0.00075 (±0.019) 0.004 0.1016 ±0.00025 (±0.0064) 27: Grey
28 0.01425 0.3620 ±0.00025 (±0.0064) 0.00725 0.184 ±0.00075 (±0.019) 0.0035 0.0889 ±0.00025 (±0.0064)
29 0.01325 0.3366 ±0.00025 (±0.0064) 0.00725 0.184 ±0.00075 (±0.019) 0.003 0.0762 ±0.00025 (±0.0064)
30 0.01225 0.3112 ±0.00025 (±0.0064) 0.00625 0.159 ±0.00075 (±0.019) 0.003 0.0762 ±0.00025 (±0.0064) 30: Lavender
31 0.01025 0.2604 ±0.00025 (±0.0064) 0.00525 0.133 ±0.00075 (±0.019) 0.0025 0.0635 ±0.00025 (±0.0064)
32 0.00925 0.2350 ±0.00025 (±0.0064) 0.00425 0.108 ±0.00075 (±0.019) 0.0025 0.0635 ±0.00025 (±0.0064)
33 0.00825 0.2096 ±0.00025 (±0.0064) 0.00425 0.108 ±0.00075 (±0.019) 0.002 0.0508 ±0.00025 (±0.0064)
34 0.00725 0.1842 ±0.00025 (±0.0064) 0.00325 0.0826 ±0.00075 (±0.019) 0.002 0.0508 ±0.00025 (±0.0064)

Note: Gauges in BOLD (even sizes, 14-30) are in stock in metal.

Note: Color is for plastic luer tips, and may not be standard for all manufacturers.