Neuroscience Cannulas for in vivo Investigation of Rodents


The WPI cannulaWPI cannula system for neuroscience study and pre-clinical research includes an entire range of cannula options. You are guaranteed:

  • Exceptional Quality
  • Best Prices
  • Rapid Order Response

The three primary components include the Guide Cannula, the Internal Cannula and the Dummy Cannula (cap).

  • WPI cannulas are beveled inside and out and then polished to remove any burrs and ensure that the inside diameter is perfectly cylindrical. This limits undesired trauma to tissue and ensures smooth operation.
  • WPI offers exceptional quality at the best prices.
  • Quantities of each item are kept in stock so you can order as needed.
You can see the difference for yourself, when you compare the WPI cannula with the top competitor under a microscope.

Guide Cannulas

Guide Cannulas

The Guide Cannula is a surgical grade, stainlesssteel tube that is implanted into a rodent's skull and cemented into place using dental cement and screws. It guides the Internal Cannula to the specific injection site.

Guide Cannulas

Internal Cannula

Internal Cannula

The Internal Cannula is inserted into the Guide Cannula to sample or inject fluid.

Dummy Cannula

Dummy Cannula

The Dummy Cannula has a stainless steel wire core, and it is placed in the Guide Cannula when the Internal Cannula isremoved. It seals the opening and prevents tissue from entering the bottom of the Guide Cannula. The Dummy Cannula is threaded to securely tighten it so that the animal will not unscrew it while grooming.

Dummy Cannulas are ordered based on the projection length, just like the Internal Cannulas.


Order the Guide Cannulas based on the gauge and length from the base, and the Internal or Dummy Cannulas based on the length of the Guide Cannula and the projection from the Guide Cannula tip

Understanding Part Numbers

Part Numbers of Cannulas

Cannula Type

  • GC–Guide Cannula
  • INC–Internal Cannula
  • DUMC–Dummy Cannula

Gauge–Choosethe gauge of the Guide Cannula that will be used, even if you are specifying an Internal or Dummy Cannula. Choices include 22, 24 and 26 gauge.

Length–GuideCannulas can be ordered in a range of lengths from 3.4–8.5mm. Length can be specified to 0.1mm, with a tolerance of ±0.07mm. For example, a GC24-60 is a 24ga. cannula that is 6.0mm long. For other cannulas, the length is determined by the desired projection length and the guide cannula length. The projection can extend beyond the tip of the Guide Cannula up to 1.0mm.

   DUMC Length = GC Length + Projection
   INC Length= GC Length + Projection

For example, for an Dummy Cannula flush with the end of a 24ga. Guide Cannula that is 6.0mm long, order an DUMC22-60. For an inernal cannula that projects 0.5mm beyond the 6.0mm Guide Cannula (6.5mm), order an INC22-65.

Dummy Cannula


Guide Cannula, XX gauge (22, 24 or 26), Y.Y mm below plastic pedestal (3.4–8.5mm) 
INCXX-ZZ Internal Cannula, XX gauge (22, 24 or 26), Z.Z mm below plastic pedestal (3.4mm–9.5mm)
DUMCXX-WW Dummy Cap, XX gauge (22 or 26), WW mm below plastic pedestal (3.4–9.5mm)
504278 Flexible PE Tubing, 0.25mm ID, 0.5mm OD, 1m long $6.95
504279 Flexible PE Tubing, 0.42mm ID, 0.85mm OD, 1m long $6.45
Flexible PE Tubing, 0.6mm ID, 1.1mm OD, 1m long $5.95
504281 Fixing Screw for Connecting Injector and Guide Cannula $6.95
504282 Instant Cyanoacrylate Adhesive, 3g $11.87
504283 Instant Cyanoacrylate Adhesive, 20g $27.00

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