Hillman 3/16-in x 6-in Brass Round Tube in the Tubes department at

Busy Beaver Hardware Your Local Hardware Store

Hillman Steelworks 1-1/2 In. x 3 Ft. Steel Perforated Square Tube - Wood Shed Lumber & Hardware Supply

METALLIXITY Copper Tube (3mm OD x 0.25mm Wall T x 300mm L) 4Pcs, Straight Tubing - for Home Furnishing, Machinery, DIY Handicraft : Industrial & Scientific

Aluminum Square Tubing

Hillman Washers, For Decorative Appearance, Brass-Finish, Assorted Sizes

HILLMAN Iron Rods and Tubes - Hardware

STEELWORKS BOLTMASTER 11479 Round Aluminium Tube, 3/4 x 96 : Industrial & Scientific

Metal Tubes McLendon Hardware

Hillman Steelworks 1 In. x 6 Ft. Steel Square Tube - Tahlequah Lumber