Dear Friends !
I've broken down wifi (2.4+5) antenna on hap ac3.
What is spare part exact name\code ?

"MikroTik HGO-ANTENNA-OUT" looks like what I need.
Is it proper antenna ?
https://mikrotik.com/product/hgo_antenna_out

Thank you !

Yes.
That should be the one.

This is the "outdoor" version. (No hinge!)

If not available, Check web-shops for "dual band rubber duck antenna" ... check the connector type, impedances are mostly 50 Ohm. Gain varies from 2dBi to 8 dBi.

Have to try some one day ... many results for my search string "Omnidirectional+WiFi+Antenna+8dBi+RP-SMA+Male+2.4GHz+5GHz+5.8GHz+Dual+Band". Try at your own risk!

This is the "outdoor" version. (No hinge!)

Good catch ! Didn't see that.

Yes, that outdoor antenna is not flexible, it is a one piece. You can't buy the hAP ax3 antenna separately from MikroTik, but you could use a different brand antenna if it has the same connector type and is compatible with the desired frequency