The Bucher Hydraulics 095521420 is an original equipment manufacturer (OEM) vent filter and filler neck designed for hydraulic tanks. This crucial component ensures the hydraulic system remains free from contaminants while allowing for proper air exchange, preventing pressure build-up or vacuum formation. It facilitates easy and clean filling of hydraulic fluid. The filter element helps to maintain the longevity and efficiency of hydraulic components by preventing airborne particles from entering the system.