It will be a brass nipple manufactured by Hoshi Kogyo, the last spoke manufacturer in Japan and the only manufacturer that has NJS approval.
Made of high quality domestic brass material, it has excellent corrosion resistance and is suitable not only for mechanical assembly but also for manual assembly.
Made in Japan
Size: # 14 (JIS standard: BC2.0)
Weight: Approximately 1.01g
Nipple turning: 3.4 mm (JIS standard)
Color: Silver & Black