100 CORK RINGS 11/4"X1/2" GRADE EXTRA BORE 5/16" (8 mm)

YOU ARE BUYING 100 CORK RING WITH 11/4"(DIAMETRO)X1/2"(TICKNESS) GRADE  EXTRA WITH BORE 5/16" = 8 MM, THIS IS THE BEST GRADE YOU CAN FIND MADE WITH PORTUGUESE CORK.

MY GRADE SISTEM IS:(FROM BETTER TO LOWER GRADE)

TOP FLOR, FLOR, EXTRA, A+, A AND B