Check the listing for details. SwimEasy 2-Panel System Installation Kit (Roof/Rack Mounted). Condition: New. Listed at 213.30 USD. Contains the necessary parts for completing a two solar pool heater panel installation to a solid mounting surface. The included hardware will allow the panel to be secured to the mounting surface, connect the feed and return plumbing lines, secure body straps and cap the headers. Compatibility: Will work with any solar pool heating system that has round 1.5” I.D. or 2" I.D. header manifolds and makes attachments with rubber hose type connectors. MEASUREMENTS, SIZING & PRODUCT DATA 1.9" (1-7/8") O.D. Header: For solar pool panels containing a 1-1/2″ I.D. header (1.5″ manifold I.D. / 1.9″ manifold O.D.) Rubber connector hose is 1.9″ (1-7/8″) I.D. 2.375" (2-3/8") O.D. Header: For solar pool panels containing a 2″ I.D. header (2″ manifold I.D. / 2.375″ manifold O.D.). Rubber connector hose is 2.375″ (2-3/8″) I.D.