All Silicone Foley Balloon Catheter is made of 100% silicone. The smooth surface minimizes the risk of sores forming. The elasticity and bio compatibility ensure maximum comfort for the wearer. Two & Three-way transparent, 100% silicone Balloon sizes: 3-5 ml/5-10 ml/10-30 ml Symmetrical balloon to ensure optimum anchoring in the bladder Rounded, sealed tip, Color-coded valve