The Tuff-Seal™ WH Series of watertight conduit hubs feature a design with unique angled serrations that provide a larger and tighter surface contact plus a reliable watertight seal even with rough or oversized knockout. Remke conduit hubs are rated NEMA 4 and may be used in either wet or dry applications. The Tuff-Seal™ WH Series hubs are suitable for use with rigid service entrance conduit. Designed with simple 2-piece construction, Remke WH Series hubs offer positive grounding, protective insulated throats that prevent wire abrasion and an embedded O-ring to ensure a watertight seal. A grounded style is also available.