+ 4 for towerbimini. Monster tower makes a Cargo Rack Bimini that you can store boards on top. That might be what you have seen. I don't believe that is an option with towerbimini. This is ours from towerbimini. ( No shoes in boat, no shoes when taking photo of boat). Went with stainless fittings. I would have to take measurements but it is more than adequate. It really is a quality product with quality service.

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Link for Cargo Rack Bimini from Monster
http://shop.monstertower.com/p-103-c...ck-bimini.aspx