The Grasso Suction Oil Filter Set (Blue Marked) is a specialized filtration system designed for use in Grasso refrigeration compressors. The blue marking indicates its specific application for high-efficiency filtration. This set effectively removes contaminants from the oil before it enters the compressor, ensuring that only clean oil circulates through the system. It helps protect critical components from damage, enhances system performance, and extends the lifespan of the compressor and refrigeration system.