Dear Sirs,Langfang Yian Fire Fighting Technology Co.,ltd. is a Langfang Yian Fire Fighting Technology Co.,Ltd.,specialiezed in producing the most advanced water-based fire protection products with the distinctions of non-toxic & envionmental protection,high-efficiency and applicable temperature -20-+55℃,which has been certified by the Certificate of Conformity isssued by ETL.Langfang Yian Fire Fighting Technology Co.,ltd. is among the very few producing agent for the fire grade 3A-89B.Please revert to us for more details Your sincerely. AARON NIU (Sales Manager)