Size of muzzle: 9 B3.5 1 R1 2 5 R3L B0 OB3 12 R2 3 7 B2 0 4 B4 OB1 10 6 R4 B0.5 D2 J1 OB4 13 R2L 3.5 8 B3 R0 4L R3.5 D1 OB2 11 R1L 6L B1 BT D3 J2 R3