Royal Purple Oil Filter features 100 percentage synthetic micro-glass media for superior particle removal with 99 percentage filtration efficiency at 25 microns. This product is designed with a high-performance silicone anti-drain back valve that prevents dry starts, even in extreme conditions and an extra heavy-duty rubber base gasket that ensures a leak-free seal. The Royal Purple Oil Filter also provides an ultra-strength filter housing that can endure higher burst strength than conventional filters. Royal Purple filters are fully compatible with all synthetic and conventional oils, provide superior particle removal, high-performance, optimized flow characteristics for maximum performance, and longer filter life.