Custom fields within product description

-- HikaShop version -- : 2.6.0
-- Joomla version -- : 3.4.4
-- PHP version -- : 5.5.26
-- Browser(s) name and version -- : Firefox 40

How can I make (a sort of) custom fileds within the Description of a product? Only a simple table would be enough, but it should be loaded automaticly.

I need a (non visible) grid of six rows and two columns. In the left colums always six labelnames, in the right colums blanc space where an administrator can enter words or numbers.

I use JCE as editor, but could change to CodeMirror.