AQUASCAPE: SIGNATURE SERIES SKIMMER 400 FILTER MAT by Aquascape $ 35.99 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart Filter mat for the Aquascape Signature Series 400 Skimmer. Dimensions: 17.5" L x 14.25"W x 1.5"H