... assimilate the advance 12 layers of spattering deposit of rivalent element technology, high borosilicate glass, gradual change of SS-C ... up to 400 degree of idle sunning, performing a strong heating ability, Certificate, CE, CCC, ISO 9001, Solar Keymark. ... ) Automatic controllers can be applied to these systems6) Electrical heating element is optionalSpecifications1) Vacuum tube counts 15,16,18,20,22 ...