Foam Base 12×18 (use for 18″ wide Tanks) (PKT 10) Convenient size to fit most tanks SKU: AFB1218 Category: Aquarium Accessories Related products Carbon Insert Aquaclear 500 / 110 Aquafx 4ft Cabinet & Hood White 48×18 Assembled (Pickup or local delivery only) 5way Breeding Trap Ammorid Insert Aquaclear 500 / 110