4001 “Original”™

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4-Bar Friction Knee

This Four-Bar knee offers more than enhanced stability and reduced energy consumption. Constructed of a unique alloy, its durable dependability makes it the knee of choice among those amputees desiring a cost effective, functional prosthesis.

All sealed ball bearing axis ensure unsurpassed smoothness of action. Perfection in design allows for a high degree of cosmesis.


  • All sealed ball bearing axis
  • Adaptable with or without locks
  • Adjustable friction and internal extension assist
  • Extremely durable and dependable



Stock Number TK-4001
Suggested L Codes L5611, L5925, L5850

The suggested L-Codes, reimbursements, and knee costs are shown for illustration and comparative purposes only. While DAW Industries believes the suggested L-Codes to be consistent with the current policies of the DMERCs, it must be understood that only appropriate authorized officials of the DMERCs are qualified to interpret their policies and practices. Accordingly DAW does not warrant, nor does it take responsibility for the validity of the information presented here, nor for the actions of any DMERC or other entity with regard to reimbursement or any other issue. DAW also recognizes that practitioners’ costs for professional services and related overheads far exceed the costs shown herein. Nothing contained herein should be construed to contradict that obvious fact. All data is subject to change without notice.




Call (800) 252-2828 for ordering information. Our trained professionals are ready and willing to find the right solutions for you!

Top of knee connectors & Alignment Systems (Type “T” Knees)
More connectors
Pylons (Ø 30mm)
Foam Covers
Skin and other finishings




This seal of excellence is earned only by very select items. Although all DAW products meet the highest standard of quality, the “Signature of Excellence” items address themselves to the select patients who demand the best of the best.


Knee Weight 28 oz 794 g
Patient Weight Limit 220 lb 100 kg
Pylon Diameter 30 mm
Knee Center to Top of Knee 3/4 in 2.0 cm
Knee Center to Most Distal End 6-5/16 in 16.0 cm
Pylon Housing from Most Distal End 2-3/8 in 6.0 cm
Knee Center to Top of Pylon 3-3/4 in 9.6 cm
Knee Center to Knee Cap at 90° Flexing 1-3/8 in 3.5 cm
Knee comes with 1 Year Full Warranty Optional 3 Year Extended Warranty
available for +10% of cost