BEGO USA'€™s Wironium Partial System features partial frames with precision fits, delicate designs and a mirror-like luster. The system consists of three products: Wirovest®, a smooth and accurate phosphate refractory material; Wirogel® M, air dried hydrocolloid material; and Wironium® CoCr alloys in standard, extra-hard and plus formulas. All alloys have an ultra-clean formula.