Hollister CenterPointLock - 11" 2-Piece Drainable Ostomy Pouch features the CenterPointLock system. This CenterPointLock system prevents accidental separation between the pouch and skin barrier. The drainable pouch is made of four layers of high quality material that acts as an odor-barrier film while it minimizes pouch noise and rustling for added discretion. Flange size: 2 1/4. Box of 10.