Intex 18' x 48" Metal Frame Swimming Pool Set with 1500 GFCI Pump | 28251EH The wall PVC material is INTEX's SUPER TOUGH, which is high molecular PVC unaffected by gasoline, oil, and salt water. SUPER TOUGH PVC is highly resistant to damage from abrasion, impact and sunlight. Set also includes an additional six Type "A" filter cartridges 29000E (59900E) for the filter pump 48" A Frame pool ladder a perfect fit complete with interior side barrier to protect your children 18' Pool Cover &amp; Deluxe Ground Cloth keep debris out of your pool and protect its from dirt, rocks and general wear Instructional &amp; maintenance DVD also included to help you get started