K&S Precision Metals 1149 Round Brass Tubing, 1/4" OD x 0.014" Wall Thickness x 36" Length, Made in USA ( pack of 5 tubes): Metal Industrial Wall Tubing: Amazon.com: Industrial & Scientific
Tube cuivre recuit - Diamètre 12 mm - la couronne de 50 m
Amazon.fr : Raccord Gripp
Buderus Copper Tube 15 mm x 1 mm Half in 5 Meter Poles : Amazon.de: DIY & Tools