Koolance LIQ-702BU-B Koolance 702 Liquid Coolant, High-Performance, UV Blue, 700ml (24 fl oz) Koolance 702 series coolant is used by many industries requiring a high performance, low-toxicity, reliable coolant with corrosion and biological inhibitors. A high quality coolant is extremely important for addressing dissimilar metals and biologic growth (bacterial and algae) long-term. Koolance liquids will not clog components and can typically be used for 2-3 years before replacement is recommended. This container includes 700ml (24 fl oz) of prediluted coolant and can function as a squirt bottle for convenient reservoir filling. It's recommended to replace the coolant at least every 2-3 years, or immediately if there is any change in color or clarity.