The iButton fobs are made of durable plastic, providing the means of economically and easily carrying or hanging all types of F5 size iButton devices, as well as making them easy to identify.
The fobs are suitable for all F5 sized iButton devices; namely: Thermochron and Hygrochron loggers as well as the ID iButtons.
Due to the properties of this plastic, we do not recommend that they be used in applications above 85°C (185°F).