Material: latex UV treated cord+ABS Better choice This package is very worth owning if you have more blinds Include 2-Sets provide more fixed position options and also used as a backup by a suitable price INSTALLATION INSTRUCTIONS Install Bungee Kit to secure your roller shades for windows in mild to moderate wind conditions. Install the Receiver approximately 5 in (13 cm) below the bottom of where the shade will stop, to allow for proper tension of bungee cord. Thread the Bungee through the End Cap Ring and back through itself making a Lark's Head Knot.