Our regular 1-1/4" H Bracket for pontoon bimini frames and adjustable struts has been around for years. Replaced 10 years ago on our deluxe bimini frames by the High Rise H bracket due to taller furniture in modern pontoon boats. The regular H bracket fits over 1-1/4" fence railings and takes accepts a 1-1/4" poontoon bimini top frame.