ITEM NAME:Water Cooling Flow Indicator Spindle Motor Engraving Machine Computer Observer Features: Good sealing,long service life, convenient to use. For the cooling waterway of the water-cooled spindle motor, observe the water flow in the waterway, and timely discover the waterless, waterway blockage, etc., so as to ensure the normal cooling of the spindle motor and avoid unnecessary damage. Easy to install, unique design, small size, durable. Easy to Observe: The black impeller is easy to observe and is usually used in computers or other water-cooled systems. The rotating blades are designed according to the flow mechanics and formed once in the machining center. Specifications: Material: Acrylic Color: clear Connector Size: (Approx)8mm Thread: (Approx)outer diameter 9.73mm Size: (Approx) 70x40mm (LxW) Package Included: 1 PC x Flow Indicator Note: 1. Due to the light and screen difference, the item's color may be slightly different from the pictures. 2. Please allow 0.5-2 cm differences due to manual measurement..For the cooling waterway of the water-cooled spindle motor, observe the water flow in the waterway. 1 PC x Flow Indicator. Good sealing,long service life, convenient to use. Due to the light and screen difference, the item's color may be slightly different from the pictures.