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