heat pipe solar collector 1. Sample availiable; 2. ISO9001, CCC, CE; 3. Competitive price; 4,SOLAR KEYMARK, SRCC certificate Features: 1) Working ... tube, from the high-temperature environment super-conduction tubes, leads the heat to the water tank, and produces ... 58mm x 1.8m / 47mmx 1.5m/70X2000mm4) Heat preservation: 72hrs 5) Hail resistance: 25mm heat pipe solar collector with aluminum mainfold