As their name suggests, their main function is to scrape or clean the rod from all impurities, dust, and dirt that accumulate when it exits the cylinder.
Their function is vital for the maintenance and life of the cylinder and the seals, since any impurity that penetrates the cylinder can cause scratches and damage the seals or internal metals, leading to significant financial investments to repair the cylinder.
There are also different profiles and geometries available for the wipers.