The THOMAS & BETTS RC610 terminal block markers are pre-printed with even and odd numbers from 1 to 20, facilitating easy identification and organization of terminal blocks within electrical installations. Constructed from durable polyamide, these markers offer excellent resistance to chemicals, heat, and abrasion, ensuring long-lasting performance. They are specifically designed for use with SNA double deck terminal blocks, contributing to efficient and professional electrical panel management. These markers simplify troubleshooting and maintenance, reducing downtime and improving overall system reliability.