Instalation instructions are not included with this item as such instructions are included in the user manual that accompanied your refrigerator. The Freshflow filter reduces common food odors in the refrigerator. It is recommended that this filter be changed every 6 months. This part does NOT come with installation instructions. This original Whirlpool Refrigerator Freshflow Air Filter originally shipped with the following Whirlpool devices: WSF26D3EXY00, WSF26D4EXB00, WRF560SEHZ00 The size of this part is 3-3/8 x 2-3/4 x 1 Inches. This is a true Whirlpool part! This item is NEW! Don't see your model number? Send us a message as we are happy to help!