It consists of of a base part with three different inserts, that can be exchanged to adapt the vase according the height or size of the bouquet it holds.

它包含一个底座和三个不同的瓶口附件，可以根据所装花束的高度和尺寸不同来调换瓶口。

youdao

Pedestal: In Classical architecture, a support or base for a column, statue, vase, or obelisk.

台座：在古典建筑中，柱子、雕像、瓶饰、方尖碑等的基座。

youdao

The base was too large to fit into the hole for the old vase, but luckily Mr. Snook, 72 years old, is the owner of a small tool and die business.

WSJ: Bronze Vases at Cemeteries Become Target for Thieves