Size: 35 mm. * Conveen© Optima Self-adhering silicone catheter is packaged in a discreet recyclable smart pack. * Easy-on application is both simple and trouble-free with the double-grip strip. *The triple-action anti-leak system with anti-kink bellow sure-grip ribs and push ring ensures maximum security to our collection bag. * The comfortable wear silicone is soft and breathable and the balanced adhesive provides reliability and skin friendliness. * Not made with natural rubber latex.