... pressurized Vacuum tube solar collector System 1.SOLAR KEYMARK,SRCC,CE 2.Antifreezing -40 degree 3.OEM provide Split pressurized Vacuum tube solar collector System1 ... ,Size:58/1800,47/1500 2,CE,SRCC,Solar keymark 3,Lifetime ... :7-20 days.Specifications:Solar energy collector:Size: 47mm,1500mm ;58mm/1800mm, tube quantity as your requirement. ...