K&S Round Brass Tube-1 ft sale individually. Available 7 different size, and 2 shape:
#8125: Round 1/16"(1.57mm)OD x 0.014" wall thickness
#8126: Round 3/32"(2.38mm)OD x 0.014" wall thickness
#8127: Round 1/8"(3.18mm)OD x 0.014" wall thickness
#8128: Round 5/32"(3.97mm)OD x 0.014" wall thickness
#8129: Round 3/16"(4.76mm)OD x 0.014" wall thickness
#8131: Round 1/4"(6.35mm)OD x 0.014" wall thickness
#8152: Square 5/32"(3.97mm)Outside x 0.014" wall thickness
#8125: Round 1/16"(1.57mm)OD x 0.014" wall thickness
#8126: Round 3/32"(2.38mm)OD x 0.014" wall thickness
#8127: Round 1/8"(3.18mm)OD x 0.014" wall thickness
#8128: Round 5/32"(3.97mm)OD x 0.014" wall thickness
#8129: Round 3/16"(4.76mm)OD x 0.014" wall thickness
#8131: Round 1/4"(6.35mm)OD x 0.014" wall thickness
#8152: Square 5/32"(3.97mm)Outside x 0.014" wall thickness