... 25mm, 32mm, 40mm, 50mm, 63mm,75mm, 90mm, 110mm5. Color: white, grey, green6. Certification: ISO9001-2008.Advantage:1. Sanitary, non- ... no rust, anti-bacterial.3. Light weight, high strength and high impact strength.4. Lower cost compared with steel fitting ... 7. Caliduct, floor and wall heating equipment.8. Piping system for other industries and agriculture. high quality white/green DN25 ppr fittings