Conductive ESD plastic storage bins, QCS10CO measures 4" x 3-7/8" x 2" and protects your electronic components from typical electromagnetic interference (EMI), electrostatic or induced fields. The conductive material on polypropylene stack and lock bins provides a barrier these fields cannot penetrate and prevents the build-up of electrostatic charge. ESD storage bins are permanently conductive and are unaffected by washing with normal cleaners. Molded from a carbon filled copolymer polypropylene material with a electrostatic decay rate at less than 0.1 second that meets military specification Mil-B-81075B. Its surface resistivity is less than 10⁵ Ohms-per square. Easy access to stored items with hopper front storage bins. Be sure all units are properly grounded according to your use. Color is Black.