This pre-filter foam is approximately 5 1/8"L x 4-1/2"W x 4-1/2H and is used with strainer AP6858. For use with all Pond Care pond pumps item numbers 705K and 705L and Rena Flow models 850/1250/4000/6000. The filter is made of coarse pore 20ppi (pores per inch) aquatic-grade foam.
