Each system above contains one vacuum regulator, one ejector (injector), one accessory pack 100% made in the usa. Machined pvc, hastelloy, kynar, and stainless steel parts. Volume discounts available technical specifications on request Accuracy: within 4% of max rotometer Capacity Operating range: 20:1, manual Back pressure: maximum back pressure at Point of application for a standard ejector Is 140 psig. For pressures greater than 140 Psig, consult factory. Tubing connections: 3/8” vacuum and vent Operating temperature: ejector, 35°f to 120°f; other components, -20 °f to 120 °f One system ships in 12x12x12 box at 10 lbs each