Square Plastic Plugs

1-1/2" Square Tubing Cap Plugs (14 - 20 Ga Fits " - 1.34" - 1.43" ID) Fencing Post Sliding Inserts ' Furniture Chair Table Leg Inserts Fitness Equipment end Caps ' by SBD 1/2"-1.5 Inch Square Black Plastic 14-20 Ga ( 1.35"-1.42" ID) Tubing...

2-3/4” Square Tubing OD 2.75" - 70 x 70 MM 6 to 9 Ga Rare Size for Thick Walls 3.6 to 5 MM  fit Inside Dimensions ID from2.5/16” to 2.3/8”. Heavy Duty Rare Size Square Plugs 2-3/4” Square Tubing OD 2.75 Inch (70 x 70 MM 6 to...