The Oregon 30355T air filter is an obsolete part number, directly superseded by the Oregon 30-355 air filter. The replacement filter, Oregon 30-355, is a high-quality component designed to protect small engines by efficiently filtering airborne contaminants. It ensures optimal engine performance and extends engine life by preventing harmful debris from entering the combustion system. This replacement filter measures approximately 133.35 mm in length, 114.3 mm in width, and 22.225 mm in height, making it a suitable cross-reference for numerous OEM and aftermarket part numbers.