E1 Leg Brace & Upper Leg Tube (not a stock item)
E2 Leg Extender Release Button (not a stock item)
E3 Clamping Collar Sleeves
(discontinued no longer available)
E4 Leg Tube Sleeves
(discontinued no longer available) E5 Leg Clips - 2 pack
F1 Upper Leg Clamp Assy (not a stock item)
F2 Upper Snap Lever (not a stock item)