SUNSUN HW-404B 5-STAGE EXTERNAL CANISTER FILTER Up to 200 Gallon Free Media replace old model HW304B by Sun Microsystems Model :HW-404B, 9w UV bulb 4 Layer/5 Stage 150 gallon, 55W 8.2 ft max, 525gph, 20 lb Dimensions 11" x 11" x 18"