Ground Notch is a notch hole which is ground through the wall of a cannula. It is used to direct the flow. It is specified by the notch depth, notch position, notch radius and notch width.

EDM, Punched or Drilled Holes are used in closed tip cannula as well as in other applications where an orifice is desired. The hole dimensions are specified by position and size. Punched holes on the tip are referred to as back eyes. The number, location and style of any hole can all be specified to suit your particular application.

Laser slot is a special shaped hole with tight tolerances applied with a laser. A multitude of hole shapes and sizes are available.