... : 20mm, 25mm, 32mm, 40mm, 50mm, 63mm,75mm7. Color: Nickel plated.Advantage:1. Sanitary, non-toxic, no heavy ... , no rust, anti-bacterial.3. Light weight, high strength and high impact strength.4. Convenient installation, reliable, recycled, environmental ... and cooling equipment system.6. Caliduct, floor and wall heating equipment.7. Piping system for other industries and agriculture. High quality double- ...