... 310mm, outer tank is 420mm(47*1500mm tube)The interval between tubes: 75mm(58*1800mm tube), 70mm(47*1500 tube Item No.Solar Vacuum ... Ø47×15002104387102 NegotiableEM-R04-1818Ø58 X 18001804897113 NegotiableEM-R04-2020Ø58 X 18002004388103 NegotiableEM-R04-2424Ø58 X 1800240387790 NegotiableEM-R04-3030Ø58 X 1800300316273 NegotiableEM-R04-3636Ø58 X ...