The 023300320, part of the RC610 series, is a pre-printed terminal block marker accessory designed for use with SNA terminal blocks. This component features horizontal markings with the numbers 11 through 20, supplied in a set of ten. Constructed from durable polyamide, it is compliant with UL, IEC, and CSA standards. These markers provide a clear and organized labeling solution for terminal connections in various electrical applications.