33 COE Rod Blue Spruce

33 COE borosillicate glass rod by Northstar

NS-079 Blue Spruce is an opaque blue/green. Work in an oxidizing flame to keep the clarity. Reduce for interesting gray streaks that appear to be growth rings of a tree.

Diameter: 3/16" - 5/16" (5mm-8mm)

Length: Approximately 20" (51cm)

Rods sold by approx 1/4 lb