MICRO DIRECT, INC. markets a complete line of spirometers, gas monitors (Breath CO and H2), pulse oximeters and related respiratory supplies to physician, hospitals, occupational health care providers and homecare in North and South America. From the simple and cost effective hand-held Micro and MicroPlus spirometers to the full featured MicroLab and MicroLoop spirometers, Micro Direct has a spirometer to meet your individual needs. Micro Direct also markets a complete line of accessories including peak flow meters, mouthpieces (cardboard, plastic and one-way), printer paper, three liter calibration syringes, and the SpiroSafe PFT filter.