19 inch 1U module carrier for 24 individual modules in keystone design, module carrier front made of black anodized aluminum, plastic module holder with dust protection flaps (other colors available as accessories) removable from the front, integrated cable clamp, additional strain relief possible, viewing window for enclosed label insert, label sheet 210 x 297 mm see accessories, grounding bolt M6 x 10 with nut and toothed washer