Heavy-duty, electrically insulated extensions for utility airspade 4000. Provide extended reach capability for hard-to-reach locations. Constructed from high-pressure rated, insulated inner air hose surrounded by non-conductive, rigid fiberglass outer tube. Inner air hose rated to 75kv per ft. For 5 minutes per sae 100r7. Outer fiberglass tube rated to 100kv per ft. For 5 minutes per astm f711. Non-sparking brass connection hardware. Compatible with all airspade 4000 components and accessories. Includes non-sparking brass coupler. features: non-conductive fiberglass outer tube with insulated inner air hose non-sparking brass sleeves and threads knurled surfaces provide superior grip for secure connections dual male threaded connections includes dual female threaded, non-sparking brass coupler