Elima-Draft covers are made of high quality Acrylonitrile Butadiene Styrene ABS plastic, They are energy efficient, re-useable, durable, easy to clean, paintable and blend in nicely with a homes dcor, To increase maximum draft protection and energy savings, we have incorporated layers of reflective foil bubble insulation to the underside of the covers that eliminates the transfer of radiant heat and provides R-Value 6 thermal protection, Color: White, Cover Style: Square, Finish: Smooth, ABS Plastic, Bubble Foil Insulation, Magnetic, Draft Protection, Prevent Heatloss, Save up to 10 annually on heating bill, Energy Savings, No Tools Required, USA, 100 Satisfaction Guarantee 100 Satisfaction Guarantee, Eliminates AC Draft and Heat Loss, Keeps Vents Cleaner, Eliminates MoistureCondensation, Easy to Install, Reusable year after Year, Paintable, Dimensions: 11 x 11, SKU: ELMD002