Twin Air Pre-Oiled Fire Resistant Air Filter

The pre-oiled air filter from Twin Air is of the highest quality and it´s very practical. The filter has been completely submerged in BIO Liquid Power Filter Oil and then massaged, to ensure all pores are evenly coated with oil. Then, it’s placed in a temperature-controlled room to allow the oil to completely cure. You just open the resealable bag and install.