This is a remix of the very good PTFE connector by Honzal. This connector does not need any additional materials except for two bits of 1,75mm filament to secure the PTFE tubes. The holes for this securing filament are very tight, I recommend using pliers to push the filament in or expanding the holes a little with a 1,8mm drill.

The tube interface is smoother than any other connector I've tried, including the Bambu original one. It is almost guaranteed that your filament won't get stuck in this connector.

I have added hole for M3 screws that allows you to attach this connector to any 3mm hole, which are quite standard on most printers.

Happy printing.