This air and oil filter set is designed for use with Caterpillar forklifts, specifically models that have the 4G63 engine. The set includes filters that are compatible with many different forklift part types, including filters for the air and oil systems. The brand of the filters is Aftermarket, which means they are not manufactured by the original equipment manufacturer but are designed to be compatible with their equipment. The model number of the filters is 91361-13300 and 30A40-00203. This set is a great replacement for old or worn out filters and will help keep your forklift running smoothly.