{HEAD ~ The particular geometry} of the hook shaped ends is designed to accommodate {TAIL ~ a variety} of gutter systems used in various pools 
{ HEAD ~ The particular geometry } of the hook shaped ends is designed to accommodate { TAIL ~ a variety } of gutter systems used in various pools
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH REL REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH