The template above may be partially or fully invisible or glitched due to the respected strings aren't entered.
This is normal.

Documentation for Item infobox

This template is used to display information about an item.

Parameters

Parameter	Example	Description
name	Spud Hat	A name that will be displayed at the top of the infobox, usually this isn't necessary and will use the page title by default.
image	Spudburger.png	A new image to use under the item's name at the top. Use this only if necessary and stick to the set convention as much as possible.
slot	Head	The slot that the item is equipped in.
used-by	Atlas, P-body	A list of classes that can equip the item.
level	Level 100 Testing Apparatus	The level of the item (used in backpack example)
team-colors	yes	If set to yes the infobox will link to two versions of a given team colored hat image under the item image, if set to two-items the item image will be removed and the team colored images replace it, stacked vertically.
quality	genuine	Recolor the item name text to represent a different quality (unique by default)