After a few years Efsun has became a brand of quality and trust with it's trustworthy management and well made products.Efsun Solar has documented the quality of it's thermal solar collectors with TSE and ITW certificates and proved to be a eco-frienly company by getting the Blue Angel certificate which shows that every metarial that we use to built our thermal solar collectors can be recycled. TYPE ive Coated Copper Collector AVAILABELE SIZES 1200*2040*100 PANEL All Copper NUMBER OF THE TUBES ON THE PANEL 10 ABSORBER COATING ive WELDING Ultrasonic TUBES DIAMETER 8-10 or 12,7 mm TUBES THICKNESS 0,50 mm PLATES THICKNESS 0,12 mm - 0,20 mm PLATES WIDTH 12 or 24 cm CASE MATERIAL AND THICKNESS Aluminium - 1,20 or 1,50 mm CASE COLOR Any Color RAL Series Anodized Or Electrostatic INSULATION Glasswoll or Rockwoll BACK PLATE Embossed Aluminium or Galvanized BACK PLATE THICKNESS Aluminium - 0,50 mm / Galvanized - 0,35 mm TOP COVER Low iron oxided Tempered Glass TOP COVER DIMENSIONS 4 mm SEALING EPDM Rubber - Top and Buttom Of The Glass RUBBER GASKED EPDM Rubber COLLECTOR OUTLET 3/4" TEST PRESSURE 18 Bar MAX WORKING PRESSURE 7 Bar WEIGHT 41,6 kg