5KW String for Heating Element 5/8" Diameter with Bolt Ends Includes 300 degree fuse link, bolts and ceramic insulators. Fuse link not used in all elements. Minimum coil length is 25". Maximum is 70". Stretch by pulling on each end of coil. Do not touch coil with bare hands. Do not allow coil to sag or touch itself or any metal parts of element. Be sure insulators are all in good condition.