Multiple gland sizes for 12/2 through 14/3 Romex® NM-B and UF-B cable. Consult Heyco for additional cable sizes. Hub sizes for 1/2 NPT and 3/4 NPT electrical knock-outs or threaded couplings. Consult Heyco for PG and Metric threaded hubs. Ratchet design of sealing nut assembly provides superior anti-vibration protection and ensures a firm grip on this cable. Integral Sealing Ring ensures a superior seal at mounting locations every time. All nylon construction with TPE sealing gland resists salt water, weak acids, gasoline, alcohol, oil, grease, and common solvents. (This feature is not assessed by UL.) Assembled Metal Locknuts INCLUDED.