6 nipples provided within the kit.
This is a professional repair kit from Welzh Werkzeug for repairing broken bleed nipples on brake calipers.
Simple to use just drill out the old nipple with the special drill bit and re-tap a new thread with the supplied tungsten tap.
If the caliper still works why change it just for a broken nipple, or that job at 4.30 in the afternoon and cant get a new caliper just put in a new nipple.
Comes in a convenient case for storage.