What is a nipple? You could name it differently as well.  A piece of metal, a screw nut, or what we prefer to call is the connecting point between the rim and spoke.
Demand in the market differs a lot. Different mounting systems, rims and colors as well as weight guide you to a wide range of nipples.  Producing on most modern machinery, Sapim ensures highest precision and quality.  All Sapim nipples are designed and manufactures in Belgium.