The measured volume of one, version 2 phantom is 3627 ml. The volumes could be +/- 10 ml, maybe more, but likely less. The salt solution inside the phantom contains <11 grams nickel chloride hexahydrate and 17 grams of sodium chloride in 3.8 liters of water. Inside the resolution block is hydrogenated vegetable oil. (brand name – Crisco) This unit may break open if subjected to extremes of temperature. Keep temperature between 60-80°F (15-27°C). 产品由美国放送协会监制。