Nucleus Grade:A Nucleus Color:Natural color Nucleus Shape:Round Size: 2.0-5.0bu(3-15mm) Material: ... order, OEM&ODM. Specifications: Main MaterialShellNucleus TypeFreshwater Shell Pearl NucleusBrandRegal Nucleus ColorsNatural colorNucleus GradeA&B,CNucleus ShapeRoundNucleus Szie2.0-5.0bu ... Union, Paypal, T/T and MoneyGram. Chinese Freshwater Shell Pearl nucleus/Pearl nuclei