One set of 6 mushroom liquid culture jar lid modified stainless steel valves. These valves have been modified with a luer lock syringe connector for the project minded mushroomer who wants to create their own mushroom jar lid extraction system or to upgrade existing ones. Valves are compatible with a silicon tubing size of 3/16" ID- 5/16" OD. Operates as a 1-way stopcock with an on/off manual lever and adapter for syringe attachment. Made of heat resistant materials to withstand pressure cooker and autoclave use. FAST SHIPPING!