The water level indicator & flow guage is used for visually monitoring the flow of liquid in your cooling system and also contains a handy reservoir to make filling easier. Multiple heatsink fins surround the reservoir body allowing for silent heat dissipation and the transparent cover indicates the movement of the water, warning of pump failure or problems with liquid flow. The acrylic cover also features an indicator offering easy monitoring of liquid levels within the cooling system. The package includes quick install connectors for 1/4", 3/8" & 1/2" tubing making this flow meter compatible with all standard water cooling tubing sizes.