For sale is an SGSpro Carbide bur no. SA03TN. The package is labeled "Carbide product with Cobalt binder" This bur is 2-1/2" long and 3/8" in diameter with a 1/4" shank. The Bur is new and unused. I have 2 avaiable so if you buy both the second one will ship free. The bur(s) will be shipped promptly from Missouri. Thanks for looking.