Mounting flanges to suit our SKON Pressure Gauge Range. Rear mount gauges can be mounted either via a circular flange, pressed onto the gauge body, or a stirrup which slips over the gauge thread and is tightened against the gauge display panel. Part Number Gauge Size BB1-4450.000 1.5” BB3-4450.004 2.5” BB5-4450.000 4” Precise Measurement - Absolute Advantage Sheen Kong (SKON) is a professional pressure gauge manufacturer based in Taiwan, with the best development of precision pressure gauges that are widely used in various applications such as Mechanical Engineering, Chemical Engineering, Food Industry, Pharmaceutical, and high technology electric appliances. SKON have long followed the concept of "reasonable price, accurate delivery, good quality" and several business management models to keep their production quality above the required benchmark under ISO9001:2008 TÜV certified. While maintaining a consistent 100% quality inspection for every item manufactured.