BioMembrane Resorbable Conforming Barrier Membrane is a reliable biodegradable barrier for a wide range of osseous regenerative indications. It's especially intended for use during GBR (Guided Bone Regeneration) and GTR (Guided Tissue Regeneration) Highly purified Type I Bovine Collagen Membrane, comes in 3 sizes:15mmX15mm / 25mmX25mm / 30mmX40mm