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