This sale is for a new old stock, never been used Brightboy No. 5049 Rubberized Silicon Carbide grinding wheel. These measure 7" in diameter, 1/4" wide with a 1/2" mounting hole. Made in USA.  Please see pictures and ask questions if you have them. We describe our items as accurately as possible. We do not know everything, so look at the photos as well as reading description completely. I will ship internationally and will combine shipping on multiple purchases.