30mm cable tie. These are meant to use with screw-in style buttons. Tested with Sitong and Qanba screw-in buttons but I imagine they work with Sanwa, Seimitsu, or other 30mm screw-in buttons.

I needed cable ties to hold my usb cable in place. I switched to using a gx12-5 port on my fightsticks instead of USB-C. I wanted some strain relief on the cable so it doesn't move around when transporting the stick.