ly controlled within +/-1 millimeter. The pores may be no bigger than the head of a pin, with an internationally accepted tolerance of +/_5%.
B Quality: Highly consistent, with some holes of up to 1 millimeter in diameter, with slight remains of fat. There is a higher tolerance level regarding the caliber, which can vary by +/_10-15%.
C Quality: Less consistent, the wall of the casing are thinner, holes can be up to 3 millimeter in diameter and the caliber tolerance is approximately the same as