Characters is 4.9 MM, 4.9 MM wide, 6 total 19 MM, you can choose with or without NO. All the steel quality, special pressure piston carry system structure and fine grinding wheel surface, especially suitable for all kinds of high-speed platform (flat) printing machine supporting the use of numbering machine for high quality requirements.Has a long service life, into the reset flexible, low rate of wrong number, etc.Font font height and digits and spacing can be customized according to customer's request, this product can also according to user requirements to undertake various non-standard order.