Metric OD Wall Thickness Imperial OD Wall Thickness Nominal Bore mm WT / Metre
4.76MM  0.71MM 3/16″OD 22G 3.34 0.077
6.35MM  1.63MM 1/4″OD 16G 3.09 0.206
6.35MM  1.22MM 1/4″OD 18G 3.91 0.167
6.35MM  0.91MM 1/4″OD 20G 4.53 0.133
7.94MM  0.91MM 5/16″OD 20G 6.11 0.172
9.52MM  1.63MM 3/8″OD 16G 6.26 0.345
9.52MM  1.22MM 3/8″OD 18G 7.08 0.271
9.52MM  0.91MM 3/8″OD  20G 7.70 0.210
12.7MM  1.63MM 1/2″OD 16G 9.44 0.484
12.7MM  1.22MM 1/2″OD 18G 10.26 0.375
12.7MM  0.91MM 1/2″OD 20G 10.88 0.288
14.29MM  0.91MM 9/16″OD 20G 12.47 0.550
15.88MM  1.63MM 5/8″OD 16G 12.62 0.622
15.88MM  1.22MM 5/8″OD 18G 13.44 0.479
15.88MM  0.91MM 5/8″OD 20G 14.06 0.365
19.05MM  3.25MM 3/4″OD 10G 12.55 1.376
19.05MM  1.63MM 3/4″OD 16G 15.79 0.761
19.05MM  1.22MM 3/4″OD 18G 16.61 0.583
19.05MM  0.91MM 3/4″OD 20G 17.23 0.442
22.22MM  1.63MM 7/8″OD 16G 18.96 0.899
22.22MM  1.22MM 7/8″OD 18G 19.78 0.687
25.4MM  1.63MM 1″OD 16G 22.14 1.038
25.4MM  1.22MM 1″OD 18G 22.96 0.791
25.4MM  0.91MM 1″OD 20G 23.00 0.597
28.58MM  1.63MM 1-1/8″OD 16G 25.32 1.177
31.75MM  1.63MM 1-1/4″OD 16G 28.49 1.316
31.75MM  1.22MM 1-1/4″OD 18G 29.31 0.998
34.92MM  1.63MM 1-3/8″OD 16G 31.66 1.454
38.1MM  3.25MM 1-1/2″OD 10G 31.60 3.040
38.1MM  1.63MM 1-1/2″OD 16G 34.84 1.593
38.1MM  1.22MM 1-1/2″OD 18G 35.66 1.206
44.45MM  3.25MM 1-3/4″OD 10G 37.95 3.600
44.45MM  1.22MM 1-3/4″OD 18G 42.01 1.410
50.8MM  3.25MM 2″OD 10G 44.30 4.140
50.8MM  1.63MM 2″OD 16G 47.54 2.418
50.8MM  1.22MM 2″OD 18G 48.36 1.621
57.2MM  3.25MM 2-1/4″OD 10G 50.70 4.700
63.5MM  3.25MM 2-1/2″OD 10G 57.00 5.248
63.5MM  1.63MM 2-1/2″OD 16G 60.24 2.703
69.85MM  3.25MM 2-3/4″OD 10G 63.35 5.810
76.2MM  3.25MM 3″OD 10G 69.70 6.354
82.55MM  3.25MM 3-1/4″OD 10G 76.05 6.910
88.90MM  3.25MM 3-1/2″OD 10G 82.40 7.460
95.25MM  3.25MM 3-3/4″OD 10G 88.75 8.020
107.95MM  3.25MM 4-1/4″OD 10G 101.45 9.670
133.5MM  3.25MM 5″ID 10G 127.00 11.800
158.9MM  3.25MM 6″ID 10G 152.40 13.900