Each size telescopes into the next corresponding size
Easy to cut and solder
K&S Metal Round Tube 1/4 in. x 12 in. Brass Hobbies and Model Building Carded / "K & S" METAL ROUND TUBE *1/4" D x 12" L *For hobbies and model building *Each size telescopes into the next corresponding size *Easy to cut and solder *Brass *Carded