Sunsun 2015 HW-403B 4-Stage External Canister Filter Up to 100 Gallon Free Media Replace Old Model HW303B Model :HW-403B, 9w UV bulb 3 Layer/4 Stage 100 gallon, 35W 6.6 ft max, 370gph, 16 lb Dimensions 11" x 11" x 17"