The square cork (quadretto) was  the first cap. Mass-produced since the first half of the 800 only to be rounded in the corners and then ready to be bottled.

Cured using the most modern techniques in order to maintain the highest level of cleanliness, is handcrafted by skilled operators who remove by hand all the anomalies to prepare for the subsequent processing mechanical cylindrical thus building a high quality product for great wine . The square cork is a regular parallelepiped.