Quadrant® LSG PSU stock shapes are produced from selected batches of polysulfone resin. The material combines good mechanical and thermal combined with hydrolysis and chemical resistance, and sterilizability by means of steam, dry heat, plasma, ethylene oxide and gamma irradiation. The composition of the resin used for the production of LSG PSU natural stock shapes complies with the regulations that apply in the Member States of the European Union (Directive 2002/72/EC, as amended) and in the United States of America (FDA) for plastic materials and articles intended to come into contact with foodstuffs. The natural color stock shapes have also been successfully type tested for their compliance with both United States Pharmacopeia (USP) and ISO 10993-1 guideline requirements for Biocompatibility Testing of Materials, and they come with full traceability from resin to stock shape.