For knee joints: 3R17, 3R20, 3R22, 3R33, 3R34, 3R36, 3R40, 3R95, 3R95=1 and for prostheses that include a knee joint combined with the 99B17 Modular Knee Protector with Elastic Band Extension Assist. The covers for modular transfemoral prostheses have a stepped center hole and are cosmetically pre- shaped in the ankle and knee area. Moreover, the covers are prefabricated with a conical recess in the socket area for receiving the prosthetic socket.
