What is "linee"

Linee (lines) is an artist's book by the Italian artist Piero Manzoni, created in 1959. Each work consists of a cardboard tube, a scroll of paper with a black line drawn down it, and a simple printed and autographed label. This label contains a brief description of the work, the work’s length, the artist’s name and the date it was created. Most of the lines were made between September and December 1959. 68 are known to have been made, each with different length strips inside.