All of the following are examples of single-use materials used in nail services EXCEPT:

Single-use materials in nail services are items designed for one-time use to ensure hygiene and prevent cross-contamination between clients. Disposable gloves, nail files, and cotton balls all fit this definition, as they are typically used once and then discarded to maintain a clean and safe environment.

Paraffin mitts, however, do not fall into the same category. They are usually made of durable materials that can be cleaned and reused multiple times. While paraffin wax treatments may utilize mitts that feel similar to disposable items, they are intended for repeated use after proper sanitization. This makes paraffin mitts an exception in this context, as they do not align with the single-use standard established for the other materials listed. Understanding the difference between single-use and reusable items is vital in maintaining sanitation and safety standards within nail services.