2" x 2" ABS Plastic External End Caps (Foot Stops) - 90 degree square
Amazon.com: CaSuTong 4 Pack 1 1/2 Inch Square Black Plastic Plug,Tubing End Cap,Glide Insert Furniture Finishing Plug for Square Metal Tube : Industrial & Scientific
Amazon.com: EZends Premium Grade 1 Inch Extra Durable Square Tubing End Caps (100 PK) (14-20 Gauge for Thinner Wall Tubing) Plastic Plugs/End Caps/Plastic Plugs for Square Tubing/Black Plastic Square Plugs : Automotive
Amazon.com: 1" Square TUBING END Cap Plug - Quantity of 8 : Industrial & Scientific
Threaded Bush Insert End-Caps square 30, 40, 50, 60 mm
Chair Tip End Cap - Square -Fits over 3/4'' Diameter Tube
Stainless Square End Cap
Amazon.com: 3" Square Tubing Heavy Duty Plastic Plug End Cap Insert 3x3 8-14 Tube Pipe Post (2) : Industrial & Scientific
ELESA, Square, 0.12 in Tube Wall Size, Tube End - 29AU84|NDX.Q-1-1/2X0,120- B 3/4-10 - Grainger
Flush End Cap for Square Tube - 650 - Architectural Railings - End-Caps & Finials
Square End Caps & Tube Caps | Essentra Components US
Flat End Cap for Square Tubing, 316 Satin Stainless Steel
Amazon.com: Prescott Plastics 2.5" Inch Square Plastic Hole Plugs Insert (10 Pack), Heavy Duty Black Hardware Plugs and End Caps for Metal Tubing, Fence, Glide Insert for Pipe Post, Chair Legs and
Tubing Caps 4" Square Black Plastic 4x4 inch, Finishing Plug, Pipe Tub – JSP Manufacturing
2" Square TUBING END Cap Plug - Quantity of 8: Amazon.com: Industrial & Scientific
Square Vinyl End Caps Instock Fast Ship - Max-Gain Systems
Amazon.com: 3" Square Tubing Heavy Duty Plastic Plug End Cap Insert 3x3 8-14 Tube Pipe Post (2) : Industrial & Scientific
Tubing Caps 4" Square Black Plastic 4x4 inch, Finishing Plug, Pipe Tub – JSP Manufacturing