Various
A standard that expresses the quality of the metal. Is part of the UNI 7064 standard or similar standards in other countries
The standard includes the percentages of various materials that make up the metal component.

An example of a cover that carries the standard on the "ultimate manhole covers" site. From this lid the picture that appears in the general section was taken.
There are 1 manhole covers in the site that has this standard
Click for all the covers with this standard

Click for the rest of the standards in the site

The ultimate manhole covers site

Initiating the site - Eli Zvuluny - Programming and building the site Possible Worlds Ltd. Possible Worlds Ltd. © 2017-2018

© ALL RIGHTS RESERVED - The site and its content are copyright protected. The full copyrights of the site's content belong to Eli Zvuluny. All images in the site (unless another photographer is mentioned) were taken by Eli Zvuluny that has the full copyrights on them. The use of any images or other materials included herein, in whole or part, for any purpose is expressly prohibited without the written permission of Eli Zvuluny. .