E-COOL Manufacturing Co,. Limited, specializing in the production refrigerant gas R141B R412B refrigerant r22 R290A R401A R402B R404A R406A R407C R410A R415B R417C R502 R507 R600A ECT ,besides we have welding tools for refrigeration.mapp gas & propane, mapp pro are our superior products in China...... accumulated a great experience in business and has developed into one of the most prominent and the largest suppliers and producers of Compressor, Motor, Component, and Refrigerant and A/C spare parts systems in mainland, China.