K2 Foot

K2 Foot

The new K2 Foot from Fillauer is engineered from the ground up for the functional level 2 patient. While other K2 designs typically fall into two categories, stiffer SACH feet and softer K3 designs, the Fillauer K2 Foot is a new design specifically for the functional level 2 patient. Patient testing shows K2 level patients walk with a more controlled gait pattern and need more stability at midstance. With this in mind, we engineered the K2 Foot with a unique flexible keel to provide better control and stability. When the patient is ready to go, so is the K2 Foot with a compliant forefoot that loads easily and provides support through toe off.

K2 diagram

Features & Benefits

  • Specifically engineered for K2 patients
  • Unique flexible keel/multi-axis design
  • Flexible, impact reducing design
  • Roll-Over Shape (ROS) designed for a natural gait
  • Compliant dynamics for comfort and stability
  • Positive lock foot shell interface for stability
  • Simple, maintenance-free design
  • Foot comes assembled in foot shell for an easy, “out-of-the-box” fit


  • Weight rating: 365 lbs. (166 kg)
  • Foot sizes: 22 – 30 cm
  • Heel height: 0.4 in. (10 mm)
  • Foot height (in shell to base of pyramid): 3.5 in. (9 cm)
  • Foot weight (26 cm): 14 oz. (395 g)
  • Attachment: Modular pyramid


  • L5972 – All lower extremity prostheses, flexible keel foot
  • L5986 – All lower extremity prostheses, multi-axial rotation unit (“MCP” or equal)

Suggested L-Codes are provided as a reference only. It is the responsibility of the practitioner and/or patient care facility submitting this claim to determine and submit the correct coding within all established rules and guidelines.


Product Manual

Ordering Information

K2 Foot System

134-CCC-XX-X Example: 134-13L-25-B = Color 13, Left, 25 cm, 160 lbs.
MCV Foot Shells

To order, choose the color (CC 03, 09, 13, or 99).
Then, select the side (left or right).

  CC 03 CC 09 CC 13 CC 99
Left 03L 09L 13L 99L
Right 03R 09R 13R 99R

Custom colors are available as a special order with three weeks lead time. Please contact Fillauer Customer Service for more details.

    22 cm 23 cm 24 cm 25 cm 26 cm 27 cm 28 cm 29 cm 30 cm
99–130 lbs. 45-59 kg 22-A 23-A 24-A 25-B 26-B 27-B 28-B 29-D 30-D
131–164 lbs. 59-74 kg 22-A 23-A 24-A 25-B 26-B 27-C 28-C 29-D 30-D
165–199 lbs. 75-90 kg 22-B 23-B 24-B 25-C 26-C 27-C 28-C 29-D 30-D
200–235 lbs. 91-107 kg 22-B 23-B 24-B 25-C 26-C 27-D 28-D 29-E 30-E
236–275 lbs. 107-125 kg 22-C 23-C 24-C 25-D 26-D 27-D 28-D 29-E 30-E
276–365 lbs. 126-166 kg 22-D 23-D 24-D 25-E 26-E 27-E 28-E 29-F 30-F

K2 Foot includes foot shell. The foot model recommendations on the selection chart are based on average patients engaged in normal activities. If your patient is more active than average or lifts heavy loads as part of a daily routine, then selecting the next weight category higher is advised. If you are not sure which foot to select, please consult with one of our technical service representatives.


  • 2 years from date of patient fitting
  • Foot Shell: 6 months from date of patient fitting

The K2 Foot System has been designed and manufactured for specific patient weights. Failure to follow the weight guidelines and/or overload conditions caused by the patient, such as heavy lifting, high impact sports, or abusive activities that would otherwise damage the natural limb, may void the warranty.

Satisfaction Guarantee

  • 30 days from date of patient fitting

For more information and ordering, email Customer Service or call 1-800-251-6398.