GDT BioMembrane 15 x 15mm Highly Purified Type I Bovine Collagen Membrane, 1/Pk. BioMembrane is biocompatible and promotes the binding of factors of growth, platelet aggregation, osteoblasts, and osteoclasts, which causes remodeling of bone tissue and stimulates repair of a bone defect. Made For GDT Implants.