Sapim BAT Reduction Brass Nipples – Silver – 14G Head 13G Thread

From Sapim:

Sapim nipples in nickel plated brass. All nipples are forged. Arguments in favour of a brass nipple are price and rigidity.

A standard brass 14 gauge nipple designed to accept larger 2.3mm 13 gauge spokes, for fitting 2.3mm spokes to a standard diameter spoke hole.