Sight glass (ISO9001:2008,CE,TUV certified) Specification: DN25-DN100,1"-4",large size to be customized Materials: AISI304,AISI304L,AISI316,AISI316L Surface treatment: Mirror polishing(180G,240G,400G) Connection: welded , threaded , clamped and union type. Shape: straight type,cross type. Advantage: Prompt quotation, competitive price, punctual delivery and guaranteed quality. YODSN FLUID EQUIPMENT CO.,LTD",a ISO9001:2008 certified manufactory from China,specializes in producing kinds of sanitary valves,pipe fittings as well as OEM services over 15 years. Occupies area of over 5,000 s.q.m and the new plant 15,000 s.q.m. under construction. We have strong R & D ability ,there are 105 staffs including 5 senior engineers. Device: YODSN combined CNC turning processing, CNC milling center, plastic injection, Die casting, press stamp, we introduced plenty of advanced devices from abroad such as Japan Mazak brand CNC machine tools, Full automatic cutting and production equipment, Automatic Argon arc welding machine and so on.