You are buying 24 Ounces (by weight) of Potassium Phosphate Monobasic. The item ships in THREE 8 Fluid Ounce (by volume) Polypropylene bottles. Potassium Phosphate Monobasic (KH2PO4); Phosphoric Acid / Monopotassium Salt / Potassium Dihydrogen Phosphate / has hundreds of uses. SHIPS FAST FROM CALIFORNIA, USA! 2-4 day transit time throughout the country. We ship three times a day; so your item is guaranteed to go out the very same day you place your order. Our bottles are made of sturdy polypropylene. The square, “space-saver” shape ensures that the bottles fit snugly on a shelf. The wide mouth makes for easy dispensing and stackability. To ensure a spill-free journey, we shrink-wrap the screw tops and seal the bottles in plastic.