K & S Precision Metals 1152 Round Brass Tube, 11/32" OD x 0.014" Wall x 36" Long, 4 Pieces, Made in The USA: Bike Tubes: Amazon.com: Industrial & Scientific
Amazon.com: Refrigeration TubingThin Copper Tube, 1/16" OD X 1/32" ID X 9.8 FT Soft Coil Copper Tubing (1/16" OD X 1/32" ID X 9.8 FT) : Industrial & Scientific