... :ISO,DIN,BS,JIS,ANSI,GB 4.Thread spec.:G,R,NPT 5.Size:20mm-75mm ppr ball valveFeature:1.Material ... , not scaling, no rust, anti-bacterial.3. Light weight, high strength and high impact strength.4. Convenient installation, reliable, recycled, environmental protection ... heating equipment.7. Piping system for other industries and agriculture. High quality double-head PPR ball valve