We are a manufacturer, mainly produce R22, R134a, R141B, R32, R143A, R125 and R404A, R406A, R408A, R507. You can get more information abt our refrigerant gas by visiting our company website:xxxxx I am looking forward to your good news. xxxxx.Steven ---------------------------------------------------------------------Ningbo Koman's Refrigeration Industry Co., Ltd.NO.20 Yongdinghe Road, Fine Chemical district, Xiapu Beilun, Ningbo, ChinaTel:+86 (574) 86910065Fax:+86(574)86910070E-mail: xxxxxhttp://xxxxx ----------------------------------------------------------------------