TOPSUN babban masana'anta ne a kasar Sin, wanda ya kware wajen samar da kayan kumfa masu inganci, gami da rufaffiyar kwayar halitta da nau'in kwayar halitta. Babban kewayon samfuranmu sun haɗa da EVA Foam, PE Foam, XPE Foam, IXPE Foam, IXPP Foam, EPDM Foam, CR Foam, NBR/PVC Foam, PVC Foam da Silicone Foam don samar da masana'antu daban-daban kamar gini, mota, marufi, da wasanni.