NEW VISI-FLOW 1421 SIGHT FLOW INDICATOR 3/4" | eBay
OPW 1 1/2 in. 316 Stainless Steel VISI-FLO 1500 Series Flanged Sight Flow Indicators w/ Propeller - John M. Ellsworth Co. Inc.
VISI-FLOW 1/2" SIGHT GLASS FLOW INDICATOR 1421DSW
Service Station Equipment-Gas Station Supplies, Nozzles, Swivels, Breakaways-White Tucker Company - OPW 3/4" VISI-FLO 1400 Series Sight Flow Indicator, Viton, Stainless-Steel