Penrite 10 Tenths Foam Filter Cleaner 4 LitrePenrite 10 Tenths Foam Filter Cleaner 4 Litre Foam Filter Cleaner is a specially formulated product, for cleaning motorcycle foam filters. It is a ready to use, non caustic and water soluble cleaner that effectively removes trapped dirt, tacky filter oil, grease and other contaminants from foam filters and washes away thoroughly. Its advanced formulation cleans effectively and prevents deterioration of the foam ensuring longer filter life. It does not