STAINLESS STEEL 304: The materials used to make this sink rack are highly rust resistant to ensure its longevity. Made of high quality, durable stainless steel, this sink sponge holder will last a long time without letting you down. PRACTICAL: The kitchen sink sponge holder has a hook design to ensure maximum ease of installation. You can store your sponges to always have them at hand. It's also dishwasher safe for easy cleanup after extended use. ALWAYS CLEAN - This sink storage rack will help you keep your kitchen clean by keeping water and dirt away from your utensils. It also has a perforated design for good ventilation and faster drying of your tools, no more soggy sponges and no more fleeting sponges due to mold or bad odors. ADDITIONAL NOTES: The hook on the side of the sponge holder fits sink partitions less than 3.5 cm / 1.4 inches wide. This kitchen sponge holder is perfect for large double bowl sinks. Please measure the size of your sink before ordering. SPACIOUS: Our sink storage shelves are extra spacious, meaning all of your kitchen essentials will be housed. Its durable construction and space make it a perfect choice for your sink, however large. Its sturdy welded hook holds the bowl above the sink and can hold much more weight than ordinary suction cups. Please note that due to manual measurements and display differences, there may be slight differences between individual products and photos.