33 COE borosillicate glass rod by Momka's Glass.
MB062 Obsidian is a strong dark cobalt blue that does not thin out. Avoid reducing flame. Neutral flame works best.
Diameter: 3/16" - 5/16" (5mm-8mm)
Length: Approximately 20" (51cm)
Rods sold by increments of .25 lb (1/4 lb; 1/2 lb; 1 lb).*
*Please note: our totals may vary slightly. We charge for exact weight shipped and will try to ship exactly what you order, but the weight may vary slightly.