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