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Tubing Size Reference Chart

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

 

 

Values are approximate. Tygon is a registered trademark of Saint-Gobain Performance Plastics Corporation. CO-EX is a trademark of Solomon Scientific.

 

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