Usually we don't know which bi. Will need unless you have your tower installed, so we will send you the tower first and please. R tower installation, we will make sure to send you.Please always let us know your tower m. Le to track your order in admin system. Origin advancer wakeboard tower is an universal design to fit 68 to 98 inch boat, it is the most popular tower in after sales market for the feature of nice looking, firm structure and easy installation. Origin foldable tower bimini is the best fit to this tower, the bimini frame is made with 1 inch stainless tube and the canopy is made from fabric as good as Sunbrella which can last 5 years without fading and distortion.