Review on 📶 Highly Efficient 8dBi Wireless Router Antenna Set for ASUS AC68U AC88U AC66U, RP-SMA Interface Omni Radiation Antenna Kit, Ideal for 2.4G/5G Dual-Frequency Wireless Router/Wireless LAN (4PCS) by Tim Blandin

In my experience it's difficult to find an OEM replacement antenna. They looked good from the outside and the price was attractive. It's clearly lacking in quality compared to the originals, but I can't quite figure out what's different. The included antenna cables rattle compared to the original, and they appear to be a bit cheaper. However, I've found that they got the job done, so the Boundary Wire itself may be up to par, but the case isn't. However, for what they are, they may suit your needs.