Mesh Winter In-Ground Winter Swimming Pool Cover with Water Tube Kit Fits Pool Size: 18' x 40' Black Mesh Cover with a Dense Weave, Cover Carries a 12 Year Warranty - Water Bags Included 4' Overlap around the cover Water Bag Loops and Grommet Every 4ft Comes Complete with your Water Bags (color black) to go around the Pool Cover Package includes 6 qty of 1' X 8' Double Water Bags and 8 qty of 1' x 10' Double Water Bags