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