Our S-series polycentric mechanical knee joints are designed for simplicity and stability. Geometrically aligned for confidence in every step. The knee is always in a stable position for patient’s peace of mind. The locking version is always more popular. The knee joints featured adjustable stance flexion up to 12 degrees for maximum safety during stance, adjustable flexion and extension, manual release lock, all axes with built-in bearing, superlight aluminum alloy frame and the linkage is made of aircraft alloy, suitable from K1 to K3 users