Fram, PH20A, Heavy Duty, Full Flow, Spin On Lube Oil Filter, Designed With Components That Meet Demands For Regular Oil Change Intervals According To OEM Recommendations, Cellulose Media For Efficiency & Capacity For Particle Removal, CJ4 Oil Compatible, High Strength Tapping Plates For Positive Filter Seating & Filter Performance High Strength Spiral Center Tubes That Do Not Allow For Media Collapse From Internal Pressure Build Up, Gasket Materials That Stand Up To Diesel Engine Environments, Statistical Process Control Insures Quality Manufacturing.