Rectangualr Plastic Plugs

2-3/4” Square Tubing OD 2.75 Inch (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 bout this item (Pack of 12) 2-3/4” Square Tubing...