The covers in Etterbeek are generally made of metal

 

or concrete

 

, and are square

 

, rectangular

 

, or circular

 

in shape.
In many cases, circular covers intended for sidewalks are surrounded by a square frame, which greatly facilitates paving work around them

 

.

No colored or gilded covers were found on the site, and no covers bearing the city emblem were found in Etterbeek.
In general, no covers with unique shapes or distinctive designs were found.
There are several covers used for electricity, bearing lightning symbols

 

,

 

.

The purpose of the cover can be identified by: a lightning symbol for electricity covers

 

, a special symbol ( ) usually appearing on water covers

 

, and the word GAZ on gas covers

 

.

Manufacturers
Manufacturers’ names usually do not appear on the covers, except for covers produced in other countries, such as the German ACO Group

 

or the British Elkington Gatic

 

.

Standards
The common standards are the European standard EN124

 

and the various load classes (B125–D400)

 

.
Also found are the Belgian COPRO standard

 

, the British Kitemark

 

, and the German MPA

 

.