An kafa Donsen a cikin 1996, wanda ke cikin NINGBO inda babban birni mai tashar jiragen ruwa ya ci gaba kuma mai kyau.Samun gwaninta fiye da shekaru 10 a cikin wannan filin, muna ɗaya daga cikin ƙwararrun masana'antun da suka ƙware a cikin samar da bututun filastik don samar da ruwa da tsarin ban ruwa.

Babban samfuranmu sune bututu da kayan aiki na PP-R, PP matsawa kayan aiki, bututun C-PVC da kayan aiki, bututun U-PVC da kayan aiki, bututun dumama na PE-RT, gyare-gyaren filastik da kowane nau'in bawul ɗin filastik.Misali: bawul ɗin PVC, bawul ɗin PPR, bawul ɗin C-PVC, bawul ɗin BRASS.