If you are using your black mini keg in one of its compatible beer dispense machines, here are some instructions on how to remove the top bung before you pierce with the tube from your machine.
Remove the black turn tab from the centre of the bung. Do not remove the whole bung from the keg.
After removing the turn tab, you will see a square piece of black plastic in the centre of the bung. This also needs removing. To do this, we suggest using a closed pair of scissors to help pop the plastic out.
You should now see the bottom of the bung which will be red. Your dispenser can now pierce the bung and clip onto the sides of the keg. It still may be a little tough to get the tube through the bung, but it can be done.