This is One 7/16" Round Brass Tube from K&S Engineering.

FEATURES: 7/16" diameter round Brass tube
Carefully engineered, with unlimited uses
Easy to bend and form
Carded packaging, pegged at the top for hanging

INCLUDES: One 7/16" Round Brass Tube

SPECS: Length: 12"
Diameter: 7/16"

K&S

Part K+S5137