Concentrators pulled from working miners. These are an upgraded for Nebra & SenseCAP miners.

Direct swap works fine.

All concentrators tested in a Helium miner and confirm witnesses and beacon.

Shipping in Canada is $2 and that is bubble envelope and no tracking but Canada post is very reliable.

These came from US915mhz units and I don’t know if they work with other frequencies. So do you homework before buying.

I can probably get about 3pc in one package with hats before shipping price goes up.