Kargo Master #31420 (96 inch tie down rails) and #31400   (78 inch tie down rails).  These full length “KS”  Tie-Down Rail Rack Mounts are for camper shell racks.  They distribute the rack load and provide a flat base for a tight seal on your shell.  Plus the welded 1 inch diameter full length tube gives you tie down points for cargo control and a strong step rail for access to top of rack.    Comes with all you need for quick and easy installation.   $175 per pair.