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