Pigtail Metric Extra Grip Liquid Tight Cordgrip fit flexible cords, are for use in clearance or threaded holes, and have extra long fingers inside for a superior grip. They have a flexible "pigtail" extender to prevent sharp bends and extend the life of your cable. These provide the widest range of cable and/or thread sizes available. We offer 8 sizes, for cable diameters ranging from .065" - .709" (1.700mm - 18.00mm). They are all Nylon construction, with TPE (Buna N Sealing gland). They provide protection from vibration, superior sealing at mounting ring, secure grip on the cable, and resist salt water, weak acids, gasoline, alcohol, oil, grease, and common solvents.(* Note: Locknuts ARE included. For specifications, or to order separate steel or nylon Locknuts, please refer to the Locknuts section of this guide)