Home / Chinese Boro Color / 1 lb. Cobalt 4 Frit 1 lb. Cobalt 4 Frit Manufacturer: Chinese Glass Manufacturers SKU: CH-F-COBALT4-2-3MM Price: $10.00 — In Stock A cobalt frit that's 2-3mm in size. Related Products Cobalt 5 (dark cobalt) 7mm Rod Opaque Black 7mm Rod Amber 25 x 4mm Tubing Green 7mm Rod Lake Green 32 x 4mm Tubing Cobalt Blue 25 x 4mm Tubing Transparent Pink 25 x 4mm Tubing Green 25 x 4mm Tubing