... wind and hail well CE,ISO,SRCC approved can endure 0.6Mpa high pressure high efficiency,stable Heat Pipe Tube Solar Collector ... . Leading Time: 3~7 WorkdaysMaterial:heat pipe material: borosilicate glass,with a red copper pipe in it.heat pipe QTY:15pcs ... resistance:25mm.Wind stress:180km/hFreeze protection:-25 degree. fashionable and practical Solar energy Collector (with CE, RoHS, CCC SGS ISO9001