Replacement clear cover plate kit includes 5 outer and 5 inner cover plates. Compatible with Sellstrom WHP4000 Premium Series ADF Welding Helmet. These replacement cover plates helps prevent surface damage to welding filter plate and auto darkening filters, providing long-lasting value to all your welding products. Founded in 1923, Sellstrom Manufacturing Co., is one of the oldest American brands of safety products. From safety goggles to face shields and more, our long history in pioneering industry-leading personal protective products means our equipment is designed with your safety and productivity in mind. Today, we are synonymous with the best in head, eye, face, hearing, knee and welding protective products that deliver safety, productivity, comfort and peace of mind.