PrimoChill Vortex Black POM Flow Indicator (Blood Red) Small foot print, mountable flow indicator, Laser cut acrylic face plates, and gears. Strong POM core. Stainless Steel face plate screws, gear dowel Includes: Assembled Vortex Flow Indicator, 1x G 1/4 Port Cap, White inner gear Pre-Built Ready To Use. Made in the USA. 3x G 1/4 threaded ports.