Welcome to Dr. Björn's Auto!
This filter bag is part of a simple waste oil collection and filtration system. It has 4" (10 cm) diameter and is 14" (35 cm) long. It has a 2 layered weave 25 and 10 micron and can be suspended in an appropriate catchment vessel.
It is recommended that you let the oil settle first and pour any sludge into a separate container to preserve longer filtering capacity.