These are well made waterproof woven sun canvas with 4 x 1 " Dia  Aluminum hoops on top support and 4 x 1 "  Aluminum supports on side made of quality aluminum tubing with well made connections /  great for large boat or pontoon 

Final sale $500.00 new in box 

This bimini top style shade top that mounts to the stainless stlye D rings .It can be adjusted to any angle to follow the sun , and folds flat at either end when not in use . The unique patent pending design can be assembled in minutes and fits into a compact carrying case when not in use.