Transparent polycarbonate jar and lid (2 valves; 1 manometer). For the cultivation of anaerobic and microaerophilic microorganisms in a defined and rapidly generated gas atmosphere.The requested atmosphere may be reached under ideal conditions by two methods. Either by using chemical gas packs (anaerobe systems) or by manually evacuating the jars with a vacuum pump and flushing with gas afterwards (e.g. with nitrogen); in this case no chemical accessories are needed. The jars are made of robust stainless steel or transparent PC.The lids are made of UV-resistant plastic or transparent polycarbonate with two corner valves incl. tube clips for vacuum hoses (5 mm i.d.) and with manometer for exact control of the vacuum or overpressure from -1 to 0.2 bar. The optional racks are made of stainless steel providing holders for comfortable operation of the anaerobe systems. Methods for reaching anaerobic conditions: 3 x times evacuating and filling gas; flushing with gas for 5 minutes and chemical gas production (GasPacks) for Anaerobic jars crystal. Customized: Other equipment available upon request. Examples: customized lids; e.g. made of special or heat-resistant materials; heat-resistant pressure gauges (up to 100 °C); anaerobic tank large with stainless steel cover; without cocks / manometer etc.