MODEL 4072 This mobile, stand-mounted unit includes 3" nonmarking casters, handy cord storage, chemical resistant stainless steel top, compact stand design, two 600 ml collection bottles, bacteria filter to help prevent fluid and aerosol contamination, and hospital grade plug, and is UL listed. Suction systems are equipped with an easy to read gauge, calibrated in both inches Hg and mmHg, and a suction regulating valve. The suction system is engineered to create up to 25" Hg vacuum in 8 seconds.