Craftsman 3 & 4 Gal. Replacement Filter By Kopach, 1 Pack, Original FilterIs your vacuum not working as effectively as you want it to because your filter needs to be replaced? Our Kopach filter is just what you need. This filter will fit most Craftsman brand vacuums (1988 to present brand, 3 and 4 gallon sizes), but please be aware of the following..