ESD Tote Containers. Extra tough conductive plastic boxes Note: Image is for illustrative purposes only and may differ from the actual product. The SSI Schaefer EF Series are the toughest ESD safe tote containers available today. With excellent strength alongside high levels of static protection, they can reduce your costs by minimising damage caused by static and mis-handling. The Polypropylene material also offers increased lifespan, whilst easy clean surfaces enhances longevity further. The use of foam, dividers and layer pads means they can be customised too. The conductive Polypropylene construction provides a specific volume resistance of 103 Ohm x cm and specific surface resistance of 104Ohm, ensuring that you static sensitive items are provided with the highest level of static and physical protection.