We supply the Ortho ULTIMATE knee:
ULTIMATE stability whilst walking down slopes and stairs
ULTIMATE hydraulic swing and stance phase control
ULTIMATE adjustability to provide ULTIMATE gait
The Ortho ULTIMATE knee is fabricated of strong titanium/aluminium alloy and will be suitable for patients up to 275 pounds (125 kg).  It is a weight-activated knee, with swing and stance phase solely controlled with hydraulics.
The ULTIMATE Knee's unique features allow your patient the ability to walk with a variety of settings.  It can be set as a manual locked knee, switched to a locked knee during stance phase only, before progressing to the mode which allowas the patient to descend slopes and stairs in a confident, controlled manner.
Link to Ortho home page