Cayman Maui Unibead LinerUniversal Bead liners (Also known as UNIBead, EZ Bead, or Duo Bead) are equipped with the beading style which will accommodate a Standard Bead application and or a U J Bead application. 52 inch Standard Specifications If your above ground swimming pool liner resembles an upside down letter U or J then you have a U J bead type liner application and this Universal Bead will work for you. Standard bead liners (also known as snap bead) are installed using