ITEM: New Red lava for Cactus Succulent, Bonsai Tree Soil Mix and Top Dressing - Red lava is an ideal amendment for Bonsai soil. - Its natural porous help the soil stay moist, not soggy. - All our red lava have been sieved to discard dust and dirt. - Can also be used for top dressing, its wet-dry color helps set water schedules. - Improves soil drainage, it lets air go through freely, oxygen is essential for roots development. - 100% natural volcanic scoria, does not break down easily, when watering it will not float to the top. - Product of USA. VOLUME: US Dry Gal. 1 Quart = 4 Cups = 0.25 Gal. 2.5 Quarts = 10 Cups = 0.625 Gal. 2 Gal. = 8 Quarts = 32 Cups 3 Gal. = 12 Quarts = 48 Cups COLOR : Reddish , Burgundy , some Blackish and few Grayish. SIZE: MEDIUM Particles are approximately from 3/16" to 3/8" ( 6.0 mm - 10.0 mm ) SHIPPING: Combined shipping not available on this item. NOTE: All measurements are approximations and may vary by 0.25"