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OP4 Knee

OP4 Knee


The OP4 Knee is a pneumatic, monocentric knee joint with brake function. Due to the finely adjustable brake, the joint can be adapted to the individual’s safety requirements.

Benefits of OP4 Knee

  • Braking behavior can be adjusted to suit the user
  • Individually adjustable swing phase for a harmonious gait
  • Highly acute flexion angle for more freedom of movement
  • Kneecap provides additional protection for both the knee and clothing

Impact Levels

Impact LevelExample


Daily activities involving average walking with the ability to vary speed or walking pattern.

Example: Going to the shops, confident outdoor walking.

OP4 Knee Specifications

OP4 Knee™ Product Information
Warranty Information
Amputation Level:


Knee Disarticulation

Impact Level: Moderate
Maximum Patient Weight: 100kg
Weight Of Knee: 680g (1.50lbs)
Knee Flexion: 145°