Tita-prosthesis piston type loop It is used for stapedioplasty surgery. It is connected between long process of incus (or malleus ù stapedioplasty) and oval window. It consists loop(flat band) and piston. Material : titanium medical gr 2 ( astm f 67 ) Shaft diameter û 0.4 mm Loop shaft diameter û 0.2 mm L (functional length) û 3.50 mm to 7.00 mm.