The covers in Hayes are usually made of metal

 

or plastic (composite materials)

 

, and their shape is square

 

or round

 

.

No colored or gilded covers were found in Hayes, and no covers bearing city emblems were found either.

A relatively large number of diagonal covers were found in Hayes - square or rectangular covers composed of two triangles, where the opening is made by lifting one of the triangles

 

.

Usually, the design of the covers in Hayes is not unique and corresponds to designs typical of the manufacturer. A cover located in Stockley Park is probably unique to the site and reflects the vegetation in the park

 

.

The purpose of the cover is not indicated on it.

Manufacturers
The covers are manufactured by the British company Cubis Systems

 

, the British company R&B

 

, and the French company Norinco

 

.

Standards
The common standards are the European standard EN124

 

and the load class D400

 

, as well as the British Kitemark standard

 

.