Fillauer offers the GeriMac and MiniMac knees. Both knees feature automatic lock at full extension and adjustable release at heel off. Adjustable stance flexion is incorporated to provide shock absorption and smooth gait. Knees are designed for K2 activity level with confidence and control. The GeriMac and MiniMac knees are designed to be simple, stable, lightweight alternatives to polycentric knees, with the GeriMac weighing 13.6 ounces and the MiniMac weighing 11.1 ounces. Both knees feature 145° knee flexion. The GeriMac knee is rated to 175 lbs and includes external extension assist technology. The MiniMac knee is rated to 132 lbs.