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