These sturdy pontoon bimini top fittings, made from anodized aluminum, will replace your old bimini top hardware. These are great replacement for those worn out plastic pontoon bimini frame fittings. 1-1/4" mounting bracket comes with stainless steel bolt and stainless steel locking nut for easy and secure installation. This bracket will fit any 1 1/4" Tubing - If smaller you will have to use some washers to size it up. 2 5/8" x 1 1/2" W 2" Deep