Size:5*5*5mm It use fresh mushroom to vaccum freeze dried.It keeps the flavor ,nutrition as well as fresh. Good for health. Moisture ≤5%Metal detector Sensitivity Fe Φ 0.6mm, Non Fe Φ 0.8mm, SUS Φ 1.0mm.Storage: temperature 20~25, RH<50%. With the original packageShelf life: 12months since the produce date in above mentioned condition.