Putoline Oil is a Dutch manufacturer and supplier of high-quality oils and lubricants developed specifically for motorcycles, scooters and quads, making Putoline unique. Almost 50 years of experience and continual research allows Putoline to provide cutting edge products. Manufacturing their own products guarantees consistently high-quality motorcycle oils. Putoline Oil, Driven by Technology! Putoline air filters, based on leading-edge open-cell foam technology, bring users major benefits, including: Improved performance through increased airflow Improved protection through finer filtration levels Substantial cost savings through serviceability and re-use Fully reticulated (open cell) foam, as used in all Putoline filter products, consists of a honeycomb of tiny, interlocking cells of uniform size. Fits: Yamaha WR250 Z 3RB 1991-1993 WR250 Z 4JW 1994-1997 WR250F 2001-2002 WR400F 1998-2001 WR426F 2001-2002 WR500Z 1992-1993 YZ125 1989-1992 1994-2009 2011-2021 YZ125X 2020-2021 YZ250 1988-1996 1998-2008 2011-2015 2017-2021 YZ250F 2001-2007 2009 2011-2013 YZ250X 2016-2017 2019-2021 YZ400F 1998-1999 YZ426F 2000-2002 YZ450F 2003-2007 2009