Kurt, your recollection is correct---1 inch diameter but with thick walls, thus the strength is greater than a 1 inch with thin walls. Ken Cathey, OBUOY #219 "Kurt R. Budelmann, M.D." <krbmd77 at charter.net> wrote: Is my recollection correct that the diameter of the tubing is 1 inch? __ Kurt Budelmann Everwind, Catalina 320 #1035