Pumice Stone 2–4 mm is a lightweight, porous volcanic rock crushed into small granules of 2–4 mm size. It provides excellent aeration, drainage, and moisture balance, making it useful in gardening, construction, filtration, and landscaping. Uses: Improves soil aeration and drainage in pots and hydroponics Used in cactus and succulent mixes Helps retain moisture without waterlogging Acts as a lightweight aggregate in construction Used in filtration and decorative landscaping applications