Penumbra TAG Borocolor Glass Rods

622021 TAG Penumbra Borosilicate Glass Rods.
Size: Diameter 5-7mm, length 20", weight per rod .07 lb, approximately 12-15 rods per pound. There is a .25 pound minimum per color. All Northstar rods are first quality

A reactive “silvered” cobalt blue, reformulated from one of Paul’s old favorites. Different colors are produced from reduction or oxidation. Most often produces a wide variety of blues and greens. Haze doesn’t burn off as easily as with amber/purples.