Safely store instruments that are sensitive to electrostatic discharges. Sturdy stainless steel and glass construction prevents the static buildup inherent to plastic desiccators. The inner glass surfaces of the desiccator are coated with a transparent, static dissipative polyester film. Desiccators also come with a grounding plug to prevent static discharge when indoor humidity levels fall below 40%. Adjustable shelves (two included) prevent wasted space inside desiccator. Valve lets you adjust gas flow. Both models accept 1¼4" ID tubing. Model 24000-00 has 12 shelf levels; model 24000-10 has 28 shelf levels. Protect your equipment from electrostatic discharge