At BikeMaster, they understand the quality and performance that motorcycle owners demand. They also understand that quality should be affordable. Not just for professional riders and mechanics, but for the everyday rider / mechanic as well. That is why BikeMaster continues to bring that level of quality and performance to all riders with their complete line of tools, parts and accessories at affordable prices. Made in the same factory as many O.E.M. filters. Low internal resistance allows for maximum oil flow. Exceeds O.E.M. standards for filtration and service life. Internal check valve prevents oil drain-down and dry starts. High quality materials allow for use with standard and synthetic oils. Tough steel casing and base plate, with high quality seal.