Marlen Manufacturing 3/4" Double Sided Tape Disc, Tap Opening, 3 - 7/8" OD, Pre-Cut. Marlen double-sided tape discs are used to adhere to traditional bag and body-mount ring appliances. Features and Benefits Double-sided tape disc with 3/4" stake opening. Product Specifications: Sold per package. Quantity: 10 units. Category: Self-adhesive/Tape Discs Product class: Ostomy Double-sided adhesive tape disc. 3/4" stake opening. 3-7/8 inch OD Precut.