A set of pumice sticks can be used to clean tiles, bathrooms, and kitchens, remove hard water stains, and clean rust from grills. They are also effective for cleaning and scrubbing calcium and rust buildup on pool tiles or spa surfaces. Material: These pumice sticks are made of high-quality, odorless foam glass material. They do not absorb grease or debris and are safe for people, animals, plants, and water. The sticks will not scratch ceramic tiles or metal surfaces and clean more effectively and thoroughly than a brush. Dirt can be easily wiped off and rinsed clean with water, providing an easy solution for tough stains. Sufficient quantity: This package includes multiple cleaning sticks to help maintain a clean environment. Ergonomic size: Designed to fit comfortably in your hand for easier and more comfortable cleaning. Size: 5.9 x 1.4 x 0.9 inches / 15 x 3.5 x 2.5 cm Color: Grey Material: Foam glass Package Contents: 8 x Cleaning sticks Note: Light and display differences may cause slight variations in color between the image and the actual item. Measurement may vary by +/- 1-3 cm.