Prescott Plastics 1.25" Inch Angle Iron Plug Insert (10 Pack), Black L Shaped End Cap for Metal Tubing, Fence, Glide Insert for Pipe Post, Chairs and Furniture Legs - Amazon.com
Interstate Universal Right Angle Iron, Machined, 5-1/2" x 8" x 10" - 34-801-1 - Penn Tool Co., Inc