shentai SFM-25 Features:

1) Working principle of high pressure solar heater: utilizes the alternative
    absorption coating on the inner surface of the vacuum tube, from the
    high-temperature environment super-conduction tubes, leads the heat
    to the water tank, and produces hot water
2) Easy to use, also convenient to install
3) Can be put in the courtyard, on the roof or balcony
4) Inlet water hole connects to the tap water, and the outlet hole connects
    to the tap water, and the outlet hole produces pressure hot water directly
5) Working principle of low pressure solar heater: adopts the alternative
    absorption coating to absorb the solar energy, heat the water in the
    vacuum tube directly, through the cold hot water convection, changes the
    solar energy into heat energy to store in the water tank:
    a) Adopts the double-deck highly special hard glass tube of boron silicon
    b) Double-deck glass coaxial structure, intermediate layer releases the
        vacuum, maintains 5 x 10-2Pa high vacuum for a long time while in
        charge
    c) Magnetism accuse of alternative absorption coating, AL / N / AL of
        sputter aluminum nitrogen aluminum alternative absorption coating
        solar radiation absorption rate ≥93%, and hot emittance ≤6%
    d) Long performance life: 15 years
    e) Endures climate feature: thermal efficiency is good in the whole year

Specifications:

1) inner manifold : stainless steel SUS304-2B
2) outer manifold:PVDF
3) Glass tube dimensions: diamater47mm x length1.5m x quantity25 pcs
4) Heat preservation: 72hrs
5) Hail resistance: 25mm