Each bell is a metal, typically brass, tube, 30--38 mm (1 1/4--1 1/2 inches) in diameter, tuned by altering its length.They range from C4 (middle C) to F5.
Each bell is a metal brass) in diameter. This was tuned by altering its length.They range from C4 (middle C) to F5. This was typically. Brass is tube. Tube is 30--38 mm (1 1/4--1 1/2 inches. This is brass.