Contains the basic components required to setup panel for operation. The included hardware will allow connection of the feed and return plumbing lines and end caps to the headers of the panel. This hardware kit doesn’t include components to secure the panel to a solid surface. MEASUREMENTS, SIZING & PRODUCT DATA. 1.9″ (1-7/8″) O. For solar pool panels containing a 1-1/2? Rubber connector hose is. 2.375″ (2-3/8″) O. For solar pool panels containing a 2?