If your swimming pool needs the solar hot water system, please ask the local engineer to calculate how many solar colletors required, then contact us to buy the solar collectors and other parts. 10 units of heat pipe is included. 1 pcs of manifold (10 holes) 3). solar collector of solar hot water heater Solar Tube Misol / Collecteur Solaire De Chauffe-eau Solaire 10 Tubes évacués Solar Hot Water Colector (suitable for tube 58*500mm) solar collector of solar hot water heater 10 Vacuum glass tubes (diameter 58mm, length 500mm) Manifold: Outer shell: Aluminum Alloy, Thickness:1.8mm;Insulating layer:rock wool overall 10 units of heat pipe is included. (suitable for tube 58*500mm) It can be used as solar collector for solar hot water heating system, for training project, or demon collectors , or as small solar collector for the... 10 pcs of tube holder 4). Manifold: Outer shell: Aluminum Alloy, Thickness:1.8mm;Insulating layer:rock wool overall It can be used as solar collector for solar hot water heating system, for training project, or demon collectors, or as small solar collector for the water heating system at home. etc. Evacuated Tube Collector Solar Water Heaters by Sriven Green The swimming pool may require several hundreds of this small solar collectors. JUSTTOP Wheel Alignment Pin, M14×1.25 Stainless Steel Wheel Hanger Guide Stud Pin Balancing Tool , Wheel Lug Bolt Rim Stud Pilot Pin Tire Change Guide Mechanic Tool for Most Cars in Tire Repair Tools Please don't expect it to heat the swimming pool. 1 set of aluminum bracket with bolts and nuts.