These square magnetic vent covers are designed to cover vents and block drafts in open rooms, improving the efficiency of your heating and cooling systems. This helps save energy and reduce heating/cooling costs. Vent/register covers can also be used to control airflow between different rooms. The vent covers measure 12 inches by 12 inches. Say goodbye to sliding covers and enjoy a simple, secure seal. Made with 1.5mm soft rubber magnets, these extra-thick magnetic ferrules are built to last, providing exceptional strength and durability. The thick material of the cover ensures long-lasting use without wear and tear. Strong magnetic attachment, tool-free installation: Simply place these magnetic vent covers over steel vents for a secure, secure fit. No screws, no hassle. Installation and removal are quick and easy, saving you time and effort. Suitable for any space: Suitable for vent covers in homes, basements, RVs, and apartment buildings. This register covers wall, ceiling, or floor vents, helping to reduce unwanted drafts and draft noise while improving comfort throughout the home. Color: As shown Material: Rubber+Iron Package Contents: 4*pcs magnetic air vent covers Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.