Halyard Procedure Mask, Pleated, One Size Fits Most, Yellow, Non Sterile, 1 Box of 50 Rolls and Wedges Microprocessor controlled * Professional four channel Imaging Microprocessor controlled * Professional four channel electrotherapy device that provides IF 4 Pole IF 2 Pole Russian EMS and TENS waveforms with two separate timers * The portable design lets you take it to your patient or keep it at the clinic * It'∞⁄s easy to use and is up and running within minutes * The Quattro 2 these 3M™ Steri Strip™ reinforced skin closures are safe for sensitive skin three layer fabric provides a 97 percent particle filtration efficiency The pleated style of the Halyard® procedure mask provides size flexibility to fit most adults