About Huazan Instruments Co., Ltd. Huazan Instruments Co., Ltd. Is the professional manufacturer of pressure gauges. Our company located in the east economic development zone of Yuyao City, Ningbo Zhejiang, China. Since we started our company from 2010, we have made hundreds of pressure gauges. Also we have gotten ISO9001-2008 certificate after these years&＃39; effort. Our Products and ServicesThe general pressure gauges, stainless steel pressure gauges, refrigerant air condition pressure gauges and shake-resist liquid filled pressure gauges become our on-going products in our factory. We are looking forward to providing Good Quality, Perfect Services and Reasonable Prices to our worldwide customers. In the meantime, we supply the pressure gauge spare parts to our customers also. We own the biggest case factory in China. We supply all kinds of stainless steel cases, steel cases and copper cases. Also, all the custom stamping parts, CNC metal parts and custom plastic parts are welcome. Contact UsIf you are interested in any of our items, we welcome you to contact us freely. We are ready to offer best quality and competitive cost for you. We will much appreciate if you can provide an opportunity to display our service and products, as we hope to establish long-term and stable friendships and business relationships with you.