Coolaroo Interior Cordless Blackout Shade Blinds, 48 by 72-Inch, Pearl Polyester W Acrylic Imported Cordless roller shade suitable for interior use Heavy duty spring roller mechanism easily allows for the movement of the shade up and down to desired position Total light control and thermal protection against heat and cold Aluminum head rail for added strength and durability Full automatic retraction with the pull and release of the bottom rail in one smooth action