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Evacuated glass tube solar collectors

	Technical Specifications Inner Chennel size: 80X80 mm  Outer Chennel Side: 160X160 or @180 mm  Inner Chennel material: SS316L   Outer Chennel material: SS430   Tube distance: 65 or 70 mm  Tube number: 20,24,30,40,60,64,68   Insulation: Polyrethame   Insulation thickness: 40 or 50 mm