A486 Compatible Model: With U2 Filter Features: -Filter foam pad. -Custom fit to prevent bypass. -Have a pore size that allows efficient water flow with less clogging for long-lasting filtration. -Crucial first stage in the filtration process. Product Type: -Mechanical. Pet Category: -Fish. Generic Dimensions: -U1 Weight: 0.04 lb. -U1 4.3'' H x 2.5'' W x 2.2'' D. -U2 Weight: 0.04 lb. -U2 5.12'' H x 2.36'' W x 0.59'' D. Dimensions: Overall Product Weight: -0.08 Pounds.