52" Tall Unibead Liners are made of 25 mil Virgin Vinyl. The Unibead style allows these liners to replace any Overlap or J-Hook liners and do not require any plastic coping strips. You have a choice of 3 Full Print patterns. They come with a 25 Year pro-rated warranty. We have Unibead liners to fit any size above ground pool, whether Round or Oval. FREE SHIPPING! Call 800-506-5899 with questions.