We need 180L or 200L non pressure solar water heater. with 58Dia tube 18 -20 tube..only with out assitantat tank. iner tank in ss and outer in galavanized tank.waight @ 65 to 70 Kg or more. 05 pcs first lot for trial order and later qty can be 1X40ft container based on quality and priceAwaiting your urgent replyCountry:Hong Kong