... solid Viscose , better lock bristles. 3) Hydraulic molding , solid .About the size of products:Inner diameter of the ring is ... NumberInner diameter (Inch&mm)Outside diameter (mm)Shape Pin size (mm)Pin spacing(mm)MaterialCurvedFlat PolywirePoly and wire013 &76300-400NY5 ... product inside diameter , outside diameter , shape , material , pin size .we will give you best price.2)For example: diameter ...