Βαθύτερος ήχος με σφαιρική ράβδο 10 mm

It is no secret, I absolutely love sounding my cock, the deeper the better. The 10 mm sound is quite my maximum, since it is the last sice that passes my middle line, some kind of constriction inside my cock, where I cannot go through with bigger sounds, even if my glans could go up to 12 mm already.