Size of muzzle: 4 B4 OB1 10 18 25 6 B0.5 D2 J1 OB4 13 R2L 20 28 3.5 8 B3 R0 16 R3L 23 4L D1 OB2 11 R1L 19 26 6L B1 BT D3 J2 14 R3 21 29 30 9 B3.5 1 R1 17 R4 24 5 B0 OB3 12 R2 2 27 3 7 B2 0 15 R3.5 22