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Tubing Size Reference Chart
Instech Solomon
does not sell all sizes of tubing shown here. Follow links above each
chart for available sizes and prices.
Gauge
For swivels, needles, couplers and cannulae
Gauge |
OD
(in) |
OD
(mm) |
ID
(in) |
ID
(mm) |
Vol
(µl/cm) |
| 13TW |
0.095 |
2.41 |
0.077 |
1.96 |
30.0 |
| 13 |
0.095 |
2.41 |
0.071 |
1.80 |
25.5 |
| 14TW |
0.083 |
2.11 |
0.067 |
1.70 |
22.8 |
| 14 |
0.083 |
2.11 |
0.063 |
1.60 |
20.1 |
| 15TW |
0.072 |
1.83 |
0.061 |
1.55 |
18.9 |
| 15 |
0.072 |
1.83 |
0.054 |
1.37 |
14.8 |
| 16TW |
0.065 |
1.65 |
0.054 |
1.37 |
14.8 |
| 16 |
0.065 |
1.65 |
0.047 |
1.19 |
11.1 |
| 17TW |
0.058 |
1.47 |
0.048 |
1.22 |
11.7 |
| 17 |
0.058 |
1.47 |
0.042 |
1.07 |
8.99 |
| 18TW |
0.050 |
1.27 |
0.039 |
0.99 |
7.70 |
| 18 |
0.050 |
1.27 |
0.033 |
0.84 |
5.54 |
| 19TW |
0.042 |
1.07 |
0.033 |
0.84 |
5.54 |
| 19 |
0.042 |
1.07 |
0.027 |
0.69 |
3.74 |
| 20TW |
0.036 |
0.91 |
0.026 |
0.66 |
3.42 |
| 20 |
0.036 |
0.91 |
0.024 |
0.61 |
2.92 |
| 21TW |
0.032 |
0.81 |
0.023 |
0.58 |
2.64 |
| 21 |
0.032 |
0.81 |
0.020 |
0.51 |
2.04 |
| 22TW |
0.028 |
0.71 |
0.020 |
0.51 |
2.04 |
| 22 |
0.028 |
0.71 |
0.016 |
0.41 |
1.32 |
| 22Q |
0.028 |
0.71 |
0.006 |
0.15 |
0.18 |
| 23TW |
0.025 |
0.64 |
0.017 |
0.43 |
1.45 |
| 23 |
0.025 |
0.64 |
0.013 |
0.33 |
0.86 |
| 24TW |
0.022 |
0.56 |
0.015 |
0.38 |
1.13 |
| 24 |
0.022 |
0.56 |
0.012 |
0.30 |
0.71 |
| 25TW |
0.020 |
0.51 |
0.012 |
0.30 |
0.71 |
| 25 |
0.020 |
0.51 |
0.010 |
0.25 |
0.49 |
| 26 |
0.018 |
0.46 |
0.010 |
0.25 |
0.49 |
| 27 |
0.016 |
0.41 |
0.008 |
0.20 |
0.31 |
| 28 |
0.014 |
0.36 |
0.007 |
0.18 |
0.25 |
| 29 |
0.013 |
0.33 |
0.007 |
0.18 |
0.25 |
| 30 |
0.012 |
0.30 |
0.006 |
0.15 |
0.18 |
French
For catheter OD (3Fr=1mm)
French |
OD
(in) |
OD
(mm) |
Gauge |
PE |
| 1Fr |
0.013 |
0.33 |
27 |
- |
| 2Fr |
0.026 |
0.67 |
23 |
PE-10 |
| 3Fr |
0.039 |
1.00 |
20 |
PE-50 |
| 4Fr |
0.053 |
1.33 |
18 |
PE-90 |
| 5Fr |
0.066 |
1.67 |
16 |
PE-190 |
| 6Fr |
0.079 |
2.00 |
14 |
PE-205 |
| 7Fr |
0.092 |
2.33 |
13 |
PE-240 |
| 8Fr |
0.105 |
2.67 |
12 |
PE-260 |
| 9Fr |
0.118 |
3.00 |
11 |
- |
| 10Fr |
0.131 |
3.33 |
10 |
PE-280 |
| 11Fr |
0.144 |
3.67 |
9 |
PE-320 |
| 12Fr |
0.158 |
4.00 |
8 |
PE-350 |
| 13Fr |
0.170 |
4.33 |
8 |
- |
| 14Fr |
0.184 |
4.67 |
7 |
PE-360 |
| 15Fr |
0.197 |
5.00 |
6 |
- |
Polyurethane (PU)
For Catheters, bulk tubing
Size |
OD
(in) |
OD
(mm) |
ID
(in) |
ID
(mm) |
Vol
(µl/cm) |
| 2 French |
0.025 |
0.64 |
0.013 |
0.33 |
0.86 |
| 3 French |
0.036 |
0.91 |
0.023 |
0.58 |
2.64 |
| 3.5 French |
0.047 |
1.20 |
0.027 |
0.69 |
3.74 |
| 5 French |
0.065 |
1.65 |
0.040 |
1.02 |
8.17 |
| 7 French |
0.096 |
2.43 |
0.052 |
1.32 |
13.70 |
Silicone (SIL)
For Catheters, bulk
tubing
Size |
OD
(in) |
OD
(mm) |
ID
(in) |
ID
(mm) |
Vol
(µl/cm) |
| 2 French |
0.025 |
0.64 |
0.012 |
0.30 |
0.71 |
| 3 French |
0.037 |
0.94 |
0.020 |
0.51 |
2.04 |
| 3.5 French |
0.047 |
1.19 |
0.025 |
0.64 |
3.22 |
| 5 French |
0.065 |
1.65 |
0.030 |
0.76 |
4.54 |
| 7 French |
0.085 |
2.16 |
0.040 |
1.02 |
8.17 |
| 8 French |
0.100 |
2.54 |
0.054 |
1.37 |
14.70 |
| 9 French |
0.125 |
3.18 |
0.062 |
1.57 |
19.40 |
Polyethylene (PE)
For bulk
tubing
Size |
OD
(in) |
OD
(mm) |
ID
(in) |
ID
(mm) |
Vol
(µl/cm) |
| PE-10 |
0.024 |
0.61 |
0.011 |
0.28 |
0.62 |
| PE-20 |
0.043 |
1.09 |
0.015 |
0.38 |
1.13 |
| PE-50 |
0.038 |
0.97 |
0.023 |
0.58 |
2.64 |
| PE-60 |
0.048 |
1.22 |
0.030 |
0.76 |
4.54 |
| PE-90 |
0.050 |
1.27 |
0.034 |
0.86 |
5.81 |
| PE-100 |
0.060 |
1.52 |
0.034 |
0.86 |
5.81 |
| PE-160 |
0.062 |
1.57 |
0.045 |
1.14 |
10.20 |
| PE-190 |
0.067 |
1.70 |
0.047 |
1.19 |
11.10 |
| PE-200 |
0.075 |
1.91 |
0.055 |
1.40 |
15.40 |
| PE-205 |
0.082 |
2.08 |
0.062 |
1.57 |
19.40 |
| PE-240 |
0.095 |
2.41 |
0.066 |
1.68 |
22.20 |
| PE-260 |
0.110 |
2.79 |
0.070 |
1.78 |
24.90 |
| PE-280 |
0.128 |
3.25 |
0.085 |
2.16 |
36.60 |
| PE-320 |
0.138 |
3.51 |
0.106 |
2.69 |
56.80 |
| PE-350 |
0.157 |
3.99 |
0.125 |
3.18 |
79.40 |
| PE-360 |
0.190 |
4.83 |
0.148 |
3.76 |
111.00 |
CO-EX™
For bulk tubing
Size |
OD
(in) |
OD
(mm) |
ID
(in) |
ID
(mm) |
Vol
(µl/cm) |
| T25 |
0.051 |
1.30 |
0.017 |
0.43 |
1.45 |
| T22 |
0.064 |
1.60 |
0.024 |
0.61 |
2.92 |
Tygon® (PVC)
For bulk tubing
Size |
OD
(in) |
OD
(mm) |
ID
(in) |
ID
(mm) |
Vol
(µl/cm) |
| S54-HL |
0.030 |
0.76 |
0.010 |
0.25 |
0.49 |
|
0.060 |
1.52 |
0.020 |
0.51 |
2.04 |
|
0.070 |
1.78 |
0.040 |
1.02 |
8.17 |
|
0.090 |
2.29 |
0.030 |
0.76 |
4.54 |
|
0.090 |
2.29 |
0.050 |
1.27 |
12.70 |
| S50-HL |
0.093 |
2.36 |
0.031 |
0.79 |
4.90 |
|
0.125 |
3.18 |
0.062 |
1.57 |
19.40 |
|
0.156 |
3.96 |
0.093 |
2.36 |
43.70 |
|
0.188 |
4.77 |
0.062 |
1.57 |
19.40 |
Instech Solomon
does not sell all sizes of tubing shown here. Follow links above each
chart for available sizes and prices.
Values are approximate. Tygon is a registered trademark of Saint-Gobain
Performance Plastics Corporation. CO-EX is a trademark of Solomon Scientific.
Download
 tubing size reference information [PDF]
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