You are buying Sapim Brass 13g NIPPLES in Silver. These are designed to work with 13g spokes.
“The round shape of the head of the polyax nipples works like a ball-joint between the rim and the nipple ensuring a better spoke/nipple line..”
I use these nipples day in, day out, as a professional wheelbuilder. You can also find all of Sapim’s other nipples through my webstore here
See our terms and conditions here.