No Toil Air Filter and Keepitroostin Sticker Fits Yamaha Wr250 Wr400 Wr426 1998-2002 Fits Yamaha Wr250 Wr400 Wr426 1998 1999 2000 2001 2002 DUAL STAGE FOAM: Two different pore sizes create more trapping area for even the smallest dust particles FLAME LAMINATED FOAM: Both "stages" are not glued, but heat sealed to provide maximum air flow RETICULATED FOAM: Increases dirt stopping surface area nd increase foam strength Strongest glue seams will withstand harsh solvents and gas. Pull as hard as can, foam will rip before the glued seam will Light color foam easier to spot where the filter oil has covered and where it has not OEM size for more dirt stopping capability