IM ELITE GERMAN CYSTOSCOPY SHEATH IS REUSABLE AND AUTOCLAVABLE AND IT IS AVAILABLE FOR 4MM DIAMETER CYSTOSCOPE , AND ITS HAS IN 15.5FR, 17FR, 19FR, 20FR, 21FR, 22FE, 23.5FR AND 25FR DIFFERENT SIZES . IT HAS COUNTINUOUS WATER INFLOW AND OUTFLOW INLET, IT WILL USE WITH TELESCOPE BRIDGE, IT COMES WITH AN ERGGONOMIC DESIGN WHICH MAKES MORE HELPFUL TO SURGEON, IT EASY FOR THE SURGEON TO HOLD THE INSTRUMENT PROPERLY IN HIS HAND.