Product Name: Flanged Air Valve with Double Spheres Model NO.: AVFD50-300 Body: Cast Iron, Ductile Iron Ball: Plastic, Stainless Steel Type: Single Sphere, Double Spheres Working Pressure: Pn10, Pn16, Pn25 Connection: Flanged Trademark: MEIJI, AHSUNVAL, OEM Transport Package: Wooden Cases Specification: dn40-dn300 HS Code: 8481804090 Product Description Flanged air valve with double spheresSize DN40-DN300Body Material in cast iron, Ductile iron,Ball material in Plastic ABS or stainless steelFlanged to PN10-PN16-PN25we have several different models available