Non-Resorbable Textured Barrier Membrane 12 mm x 24 mm, 1/Pk. Composed of a proprietary micro porous polytetrafluoroethylene (ePTFE) thin film, Cytoflex Tefguard has a surface texture and porosity suitable for adhesion of host cells to the material while preventing passage and integration of bacteria within the interstices of the material. **This product can only be shipped to Dental/Medical facilities.