This is a shock nitrogen-filling kit from Schmidty Racing Suspensions. Kit includes a Uniweld RHP400 (0 - 400 PSI) regulator and comes standard with 8' long rubber hose. There are different hose length options made of either rubber or stainless steel. The rubber hoses are rated to 3250 PSI; the stainless steel hoses are braided, Teflon-lined, and rated to 3000 PSI.
The hose has a standard air chuck on the end and can be used to fill tires or can be used to apply nitrogen to fill tools or chambers that have a standard small bore schrader valve. The chuck on the end is mounted to the hose via a swivel fitting that rotates 360 degrees to get into any position without twisting or kinking the hose.