Compatibility: The sponge holder rack is suitable for smooth and clean surfaces, not suitable for rough surfaces such as marble, stone, cement, etc. Material: The kitchen sponge holder is made of stainless steel, which is lightweight and rust-resistant. Suction Cups: The sink sponge rack comes with two large suction cups, eliminating the need to drill holes. Application: Stainless steel sink caddy is ideal for absorbent sponge holders in kitchens, bathrooms, dining rooms, and more. Multi-purpose: Sponge caddy can hold sponges, brushes, rags, drain plugs, and more in the kitchen.