... 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 ... system for air compression.7. Caliduct, floor and wall heating equipment.8. Piping system for other industries and agriculture. high quality white/green ...