Feature 130ml Professional Level: This 30ml DO meter storage solution is very professional, which ensures high reliability. 2Prevent Dry: This electrode storage solution can protect DO meter probe from drying out. 3Reliable Performance: This DO meter solution features professional manufacturing, providing reliable performance. 4Sturdy Material: This 30ml DO meter storage solution adopts sturdy plastic bottle, very safe to use. 5For DO Meter: This 30ml storage function is suitable for dissolved oxygen meters.Item Type: DO Meter Storage SolutionMaterial: Plastic, Electrode SolutionCapacity: 30ml .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List1 x DO Meter Storage Solution