This is for one Crush Washer. They are made of steel and have been treated in a hot oil bath to resist field corrosion. This crush washer fits the AR15 series: ammo types of 223 & 556. They are handy to apply end-of-barrel accessories like flash hiders, concussion forwarders, solvent trap cleaners, etc.
We only have a couple hundred extra in our stock and don't expect them to last long. These are not the hybrid metal crush washers, these are 100% steel so you can crush the shit out of them to fine tune your accessory &&&& they take the heat very well. :)