... .Thermon BSX,HLX 3.Anti-frost for pipe,gutter,tank and downpipe etc 4. CE, IECEX,UL ETC Neswest generation PTC ... for invention of “PTC material and preparation method” in China.Raychem, Thermon and we----Same function and technology parameter but different price on ... protection for frost protection or melting snow for pipe,gutters and downpipes protection etc.But our heating cable is more cheaper ...