Hollow Flexible Shafts for Medical Instruments

The HHS® Tube, also known as Helical Hollow Strand, is best defined as a strand with an open center working channel.

While the HHS® tube has been proven to be useful in several medical-based applications, it is often utilized for transmitting torque or pushing forces because of a high resistance to kinks and its excellent whip free features. Furthermore, it possesses exceptional pushability, torquability and use tension. The HHS® tube can be manufactured in single, double and triple layers to provide varying flexibility and control.

To meet immediate HHS® tube requests, the company ships R&D orders of almost any HHS® tube in two weeks or less with the help of its VelocitySM HHS® tube rapid prototyping program.


We design HHS® tube to meet the specific needs of our customers. We can provide parametric drawings to assist in design review and quickly return requests for quotation. For standard HHS® tube capabilities, please reference the following variables:

  • Inside Diameter*: .003” (0.0762 mm) to 0.120” (3.048 mm)
  • Outside Diameter*: .006” (0.1524 mm) to 0.160” (4.064 mm)
  • Filars*: 6-18
  • Layers*: 1-3
  • Lengths*: 1”-10' (25 mm – 3 m)
  • Pitch Direction: left, right (alternating each layer)

*If you have a request that is outside of these specifications, please contact us.


  • Over the wire device
  • Endovascular devices
  • Delivery devices
  • Catheter devices
  • Bioconductors
  • Working channels
  • Minimally invasive tools
  • Urological tools
  • Manipulation components

Available in the Following Materials

While other alloys may be available for use in the HHS​® tube, these are the most common ones:

  • 302
  • 304V
  • 35N LT®
  • 316LVM
  • TI 6AL-4V ELI
  • CP Titanium
  • Various constructions of DFT®
  • L-605
  • Nitinol
  • Platinum Alloys