They fit the end of 2 1/4" square tubing in both 12 and 14 gauge as the inside diameter is the same for either wall thickness of tubing. They seal well.
π© Enhanced Durability and Stability: Outside Joining Aluminum Profile Bracket
8 Review
π§ Boeray Stainless Steel Straight Brackets Mending: Durable and Versatile Support Solution
8 Review
π© N100 792 National Hardware Plated Holder
8 Review
π§ Inch Stainless Steel Brackets - Includes 80 Brackets
8 Review