You can use for tee or fermzilla
"It does the job"
KL21579
Bottle Cap which suits male PCO1881 threads.
This bottle cap is suitable for use on the PCO1881 lids on FermZilla's, 500mL and 2.5L PET Bottles and any FermZilla accessory which features a male PCO1881 thread.
Overall rating: 5.0 / 5 from 2 reviews.
Review topics: [].
"It does the job"
"I use this if i’m not using a hole on the fermzilla lid after testing, no leaks! Does the job"