This AMVEX medical oxygen flowmeter tube style medical air valve is a reliable and efficient tool for healthcare professionals. It is designed to provide accurate readings of oxygen flow and pressure, ensuring that patients receive the best possible care. Made by a trusted brand in the industry, this flowmeter is a top choice for medical facilities and professionals alike. Its vacuum regulator design ensures that it operates smoothly and efficiently, while its durable construction ensures that it will last for years to come. Whether you are a medical professional or simply looking for a reliable flowmeter, this AMVEX product is the perfect choice. AMVEX - MEDICAL OXYGEN FLOWMETER TUBE STYLE MEDICAL AIR VALVE Not tested-appears to be in new condition but not tested.