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