454cid
Sooper Pooper
You really don't need a full bottle - they come pressurized close to 2200PSI (IIRC). We had kits we used to charge our hydraulic accumulators on the extrusion presses. It's a couple gauges, a hose, and a Schrader valve connector. For a cushion from shock we'd charge it ~80% of operating pressure so, with a working pressure of 1,500 PSI, we'd charge it @~1,200. Once the bottle got too low, we'd switch it over to use somewhere else.
For charging an air tank, one could use this and an air hose.
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Your Amazon link is bad.... you've got to remove the https or something like that with them. If I quote your message the links is {MEDIA=amazon]B01IJI04XW[/MEDIA], which doesn't show up right.