The SM 18 by Metro Moulded Parts is a sheet metal grommet, measuring 1-1/8" O.D. and 5/8" I.D., perfectly fitting a 7/8" hole. Commonly referred to as a rubber grommet or sealing ring, this product is ideal for various automotive and industrial applications. Its robust design features a sleek black finish and precision grooves for a snug fit. Crafted with advanced rubber compounds, it boasts resistance to chemicals, sunlight, and ozone, ensuring long-lasting performance. One of the standout features of the SM 18 is its durability, which provides excellent protection against abrasion and environmental damage. The grooves enhance its grip, offering a secure seal that prevents leaks and vibrations. Installation is a breeze simply press it into the designated hole, and it will stay firmly in place, saving you time and effort. Designed for style and function, the SM 18 is a reliable choice for those seeking dependable sealing solutions. Trust in its resilience and make your purchase today. With Metro's platinum warranty, enjoy peace of mind with a 30-year guarantee, promising a free replacement if it fails. Experience the difference of quality craftsmanship and unparalleled assurance.