Modular lids (each one is a square) that usually come in pairs or more, so that a rectangle is formed Each of the square-like covering consisting of two triangular parts, so that it is opened by lifting one of the parts.
Note that the triangles that make up the lid are numbered from 1 to 4.
PT - Portugal Telecom
The lid is similar to other lids of the same manufacturer from other countries, for example