Choosing an inappropriate needle can cause substantial unnecessary harm, and injectors are often not aware of the full range of needles that are available.
This updated third edition of the poster now includes the grey and brown unisharp needles.
Measuring 660mm x 297mm, it shows all the needle lengths and gauges used by injecting drug users, and has a clear harm reduction message: 'use the shortest, thinnest needle you can.'
An essential addition to the wall of all needle and syringe programmes, this poster will stimulate discussion about needle selection, encourage services to stock a range of needles, and reduce the harm caused by inappropriate needle selection.
Price includes cardboard tube and next day delivery.
| Quantity | Price (exc VAT) | VAT | Price (inc VAT) |
| 1 | £6.66 each | 20% | £7.99 each |
| 10 | £5.14 each | 20% | £6.17 each |
FREE shipping on all UK orders over £30
If you are in any doubt about the appropriate use of any needle, or which needles can be used as an alternative, you can find out all you need to know on exchangesupplies.org
There is an article on the anatomy of a syringe at the bottom of the needles and syringes product listing page, under free articles, and then practice developments.
All the needles on the poster are available on our website, and in the 'product briefing' section of all the needles on our site, there is extensive guidance on the uses, risks and alternatives:
- unisharp 1ml (30G fixed needle syringe)
- yellow (30G needle)
- grey (27G needle)
- orange (25G needle)
- blue (23G needle)
- black (22G needle)
-
green (21G needle)
- brown (26G needle)
NB where we stock more than one length of needle, the link above is to the shortest length available in that gauge.
Find below the complete table of the inner and outer diameters of hypodermic needle gauges. In microfluidics, needles are mostly used to connect a syringe to a soft-walled tubing. You can use it to determine the needle you should use depending on the inner diameter of your soft-walled tubing.
Example: 23G needle = 0.02525" or 0.6414 mm (outer diameter) - 0.01325" or 0.337 mm (inner diameter).
Tip: always use a needle with a larger outer diameter than the inner diameter of your tubing!
| Needle gauge | Outer diameter (inches) | Outer diameter (mm) | Inner diameter (inches) | Inner diameter (mm) |
| 7 | 0.180 | 4.572 | 0.150 | 3.810 |
8 | 0.165 | 4.191 | 0.135 | 3.429 |
| 9 | 0.148 | 3.759 | 0.118 | 2.997 |
| 10 | 0.134 | 3.404 | 0.106 | 2.692 |
| 11 | 0.120 | 3.048 | 0.094 | 2.388 |
| 12 | 0.109 | 2.769 | 0.085 | 2.159 |
| 13 | 0.095 | 2.413 | 0.071 | 1.803 |
| 14 | 0.083 | 2.108 | 0.063 | 1.600 |
| 15 | 0.072 | 1.829 | 0.054 | 1.372 |
| 16 | 0.065 | 1.651 | 0.047 | 1.194 |
| 17 | 0.058 | 1.473 | 0.042 | 1.067 |
| 18 | 0.050 | 1.270 | 0.033 | 0.838 |
| 19 | 0.042 | 1.067 | 0.027 | 0.686 |
| 20 | 0.03575 | 0.9081 | 0.02375 | 0.603 |
| 21 | 0.03225 | 0.8192 | 0.02025 | 0.514 |
| 22 | 0.02825 | 0.7176 | 0.01625 | 0.413 |
| 22s | 0.02825 | 0.7176 | 0.006 | 0.152 |
| 23 | 0.02525 | 0.6414 | 0.01325 | 0.337 |
| 24 | 0.02225 | 0.5652 | 0.01225 | 0.311 |
| 25 | 0.02025 | 0.5144 | 0.01025 | 0.260 |
| 26 | 0.01825 | 0.4636 | 0.01025 | 0.260 |
| 26s | 0.01865 | 0.4737 | 0.005 | 0.127 |
| 27 | 0.01625 | 0.4128 | 0.00825 | 0.210 |
| 28 | 0.01425 | 0.3620 | 0.00725 | 0.184 |
| 29 | 0.01325 | 0.3366 | 0.00725 | 0.184 |
| 30 | 0.01225 | 0.3112 | 0.00625 | 0.159 |
| 31 | 0.01025 | 0.2604 | 0.00525 | 0.133 |
| 32 | 0.00925 | 0.2350 | 0.00425 | 0.108 |
| 33 | 0.00825 | 0.2096 | 0.00425 | 0.108 |
| 34 | 0.00725 | 0.1842 | 0.00325 | 0.0826 |