Legigo 8 LBS Organic Expanded Clay Pebbles, 4mm-16mm Lightweight Clay Leca Balls for Plants, Natural Hydroton Clay Pebbles for Hydroponic & Aquaponics Growing, Orchid Potting Mix, Drainage, TerrariumBrand: Legigo Color: 8LB Features: All Natural Expanded Clay PebblesMade of natural clay, baked at high temperature into round pellets, pH neutral helps remove excess acidity, sturdy, no odor, not easy to break, you can safely use it in your garden to help plants grow healthier and faster. Lightweight Clay PebblesYou will receive 8lbs of clay pellets, 4 16mm in diameter, the clay balls are the perfect size for small to medium pots and garden plants.