Type:WF-ZT61-80 Brand:WeiFeng Size Range:1/8"Inch to 4"Inch Body&Cap&Link Material:Carbon Steel(WCB),304/316/316L Stainless Steel Seal Material:PTFE(White)/NBR(Black)/Graphite(Black) Sealing Gasket Impeller Material:PTFE(Red/Blue)/Plastic(Red) Window Material:Tempered Glass/Quartz Glass/Borosilicate Glass/Aluminosilicate Glass Pressure Level:1.6MPa-5.0MPa Temperature Level:-30掳C to 100掳C;-50掳C to 200掳C/1000掳C End Connection:Butt Weld/Socket Weld Application Medium:Liquids,Gases,Petroleum,Solid Liquid and Water etc. Packing Method:Carton Box or Plywood Box Delivery Time:Within 10 days for 100 pieces Product Warranty:One Year without man-made destructionWholesale Sight Glass website:http://www.alvifeng.com/sight-glass/