[KBB 4000 Goose Feather 

Badminton Shuttlecocks 12ea  

1 Dozen Brand New]

<Specification>

Model : KBB 4000

Feather :  Goose feather

Cork : Natural

Color : White

Spin/Weight : 420R / 4.9g~5.1g

Feather Density : 55D ~ 60D / W43