... ) frame 1.2mm stainless steel,(7) Insulation material, rock wool or polyurethane(8) Works normally if one tube damaged( ... us.BaoBei A: Copper flat-plate solar collector with black chrome coatingModelIP-1-2.0B/TIP-2-2.0B ... , δ=1.2mmcolor of the framechampagnebronze-colouredwhiteInsulation materialglass wool, PE Foam/glass wool, high dense polyurethane foamInsulation thickness mm304050Material &thickness ...