http://www.alvifeng.com/impeller-water-flow-indicator/ Type:WF-YL41-206 Brand:WeiFeng Size Range:1/2"Inch to 10"Inch Body&Cap&Bolt&Flapper&Spring Material:Carbon Steel(WCB),304/316/316L Stainless Steel Seal Material:PTFE(White)/NBR(Black)/Graphite(Black) Sealing Gasket 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:ANSI 150LB/300LB,JIS 5K/10K,DIN,Ghost and GB Flange. 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 destructionImpeller Water Flow Indicator in stock website:http://www.alvifeng.com/impeller-water-flow-indicator/