Combination electrodes come with either a glass or epoxy body. Glass-body electrodes are ideals for laboratory use since they perform at higher temperatures and can be cleaned with common laboratory solvents. Epoxy-body electrodes are good for applications where rough handling and breakage are a problem. The electrodes have either refillable or sealed (gel-filled) references. All combination electrodes have a 3.3-ft (1-m) cable and BNC connector.