Teknor Apex (Pawtucket, RI) has introduced a series of advanced medical-grade elastomers that provide a fully practical alternative to PVC for many tubing applications. The new Medalist® MD-500 Series compounds exhibit crystal clarity and mechanical properties comparable to those of PVC, provide similar clamp resistance and resistance to kinking and necking, and have a PVC-like “feel.” They undergo minimal color shift upon heat aging after exposure to gamma irradiation. The elastomers have been shown to process efficiently on commercial high-speed tubing extrusion lines, and have been tested for compliance with ISO 10993-5 cytotoxicity standards and are free of animal-derived materials, phthalates, latex, silicones, and additives not directly required for medical applications. Standard formulations include five grades, with Shore A hardness (15 sec.) ranging from 53 to 86.