This Auto Open and Close Magnetic Screen Door is $8.99 at Tanga. Plus, shipping is free making this the best price we found by $5 shipped. This door screen measures 0.25″ × 38″ × 80″ and features 18 powerful magnets to hold the screen in place. This can be used for single doors, sliding doors, RVs, and more. Sales tax is charged in most states.