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