4” Liquid Filled Blue Ribbon 160PSI Gauge! Brand new, in original plastic and box! The Blue Ribbon Model BR301L Bottom Connected Liquid Filled Gauge is a high quality line of bottom-connected, liquid filled gauges. The glycerin filling helps dampen the effects of vibration which extends the life of the gauge. The BR301L features a stainless steel case and 316 stainless steel internals & connection. The BR301L is typically used on hydraulic and pneumatic systems as well as general commercial or industrial applications.