... pumps manufacturer in China. Populace is supplying the heat exchangers for Midea, Gree, TCL, LG, Samsung, Panasonic etc.Product Features: ... 1. Material: copper, aluminium, galvanized plate.2. Copper pipe: diameterΦ7, Φ7.94, Φ9.52, Φ12.7mm, etc. ... .6) Very competitive price with high quality products and perfect delivery date. copper tube shell and tube heat exchanger for heat pump