Part ID: 4632618 Design ID: 90640 Part Name: Shell A 4M Ball Snap Ø10.2 Category: Figure, Accessories, Shells W/ Ballsnap Colour: Black More details...
Part names, colours and categories are based on LEGO's parts classification, not BrickLink's.
The information is based on data obtained from LEGO's replacement parts system which does not contain inventories for every set, and those which it does have are often incomplete.