Our product group WAD III E and M has been revised again to achieve better corrosion protection. Now all shaft covers of the product group WAD III E are equipped with a forced venting on the underside of the cover. In the product group WAD III M the underside of the cover and the frame profile are coated with an extremely durable corrosion protection wax. Optionally a coating in different RAL-colors can be chosen by the customer. This provides an additional accident prevention.