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On dual-wheel trucks and trailers, the inner tire's valve stem is often hard to reach. This kit runs a braided stainless-steel hose from the inner valve out to an accessible point, so you can check pressure and air up both tires without crawling under the rig or removing wheel simulators.
The braided stainless hose is built to handle road grime, vibration, and weather, and the kit includes the brackets needed to mount it in place.