These bags reliably prevent corrosion damage to circuit boards, instruments and devices. The bags are filled by unit. A desiccant unit is the quantity of desiccant that can adsorb at least 3 g of water vapor at 20% and 6 g at 40% relative humidity in equilibrium with air at 23 °C. PA made of dustproof soda paper for normal applications - according to EN 61340-5-1 MIL-D-3464E - content:35g - TME:1 - PU:400 pieces