Chinese Color Light Cobalt Blue - 51mm x 4.8mm Tubing Full 4 ft Tube

Cobalt 4 (medium cobalt) is the fourth lightest of the six cobalt blue shades. Cobalt blue is a classic color for your glass blowing projects. Works well in a neutral to oxidizing flame. 10 mm diameter, 24 inches long. Minimum order quantity is 1 pound.