The pipes are branded with the wording “G. Penzo Pipe Made in Italy”, a symbol, a number and a letter.
The symbols (mountain, shell, flame) specify the finissage; the grade (from 1 to 9) indicates the shape (classic or free) and the finishing (coloured or natural).
The numbers from 1 to 5 indicate the classic shapes in rusticato finissage: coloured or natural sandblasted and coloured smooth or natural one.
The numbers from 6 to 9 indicate the free shapes in finissage: coloured or natural sandblasted and smooth or natural sandblasted.
The letters (A, B, C) identify the actual value of the pipe.