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NDI Passive Spheres

NDI Passive Retroreflective MarkersDesigned by NDI for use with the Polaris® family of products, single-use NDI Passive Spheres are used on optically-tracked tools during computer-assisted therapy, including image-guided surgery.

Looking for Disposable Reflective Marker Spheres for Brainlab IGS Systems?

Disposable Reflective Marker Spheres for Brainlab IGS SystemsNDI is the authorized Brainlab® partner for disposable reflective marker spheres. | Order Here |


  • Genuine parts used to calibrate NDI Polaris products
  • NDI Passive MarkersIndividually pouched to reduce sphere-to-sphere contact damage
  • Available in sterile packages of 1, 3, or 4 spheres
  • Double sterile barrier for ease of handling and sterility assurance
  • 11.5 mm size and audible click ensure proper mounting to NDI mounting posts for a secure attachment to tools
  • Convenient pre-sterile spheres eliminate the need for hospital processing
  • Five year shelf life

Order NDI Passive Spheres and posts in the following quantities:

  • 1 Sphere per pack, 5 packs per box
  • 3 Spheres per pack, 5 packs per box
  • 4 Spheres per pack, 5 packs per box
  • 3 Spheres per pack, 3 packs per box
  • 4 Spheres per pack, 3 packs per box
  • Passive Sphere Posts (12)

Single-use sterile NDI Passive Spheres are available from Scanlan International in packages of 1, 3 or 4 units to eliminate waste, costs and degradation associated with re-processing.