You receive 20 pieces of metal plates for magnetic mount, which can enhance the magnetic vent cover for optimal performance. The quantity provided is sufficient for most applications. Made of stainless steel, these plates are durable and resistant to deformation or breakage. High-quality materials ensure reliable performance. Each metal strip measures approximately 9 x 1.8 cm (3.54 x 0.71 in). Please verify the dimensions before purchase to ensure compatibility. To install, simply clean the surface, peel off the adhesive backing, and firmly attach the magnetic accessories. Installation is quick and easy. Designed for use on non-magnetic surfaces such as aluminum, plastic, or wood, allowing magnetic vent covers to be used without requiring steel vents. Color: Silver Material: Metal Package Contents: 20 x magnetic adhesive strips Note: The package includes only the items listed. Other products are not included. Lighting and monitor differences may cause slight variations in color between the image and the actual item. Measurement may vary by +/- 1-3 cm.