This assortment of grommets has exceeded our expectations! Based on our own experience we can confidently say that these grommets are of the highest quality and ideal for industrial and scientific applications. They are durable, easy to install, and provide excellent protection against abrasion and noise .The variety of sizes and shapes included in the assortment ensures that we always have the perfect grommet for any project. However, the assortment could benefit from including more color options for easier identification. Overall, we highly recommend this product to anyone in need of top-notch grommets for their industrial and scientific projects..