Easily placed over the wire at the time of biopsy, the stiffening cannula provides an essential indication as to the course of the wire and location of the wire tip. It is also a clearly palpable landmark and a positive, protective sheath to prevent accidental shearing of the marking wire.

Stiffening cannulas are available in 7 sizes (3cm to 9 cm long), each in its own pouch, and packaged 10 to a box. One size per box. Sterile - disposable.