1,Cetificates:ISO 9001,CE 2,Quick delivery 3,Oem ... corrosion resistance, anti-deposition and long service life, PP-R tubes also enjoy some other advantages ,like hygienicness ... friendly construction materials. Compared with aluminum multiunit tubes, PP-R tubes can be made into tubular products ... largest reaching more than 160mms in caliber. Mingda PP-R tubular products and pipe fittings are widely used ...