Schneider Electric ZB4BZ101 Single contact block with body/fixing collar, metal, screw clamp terminal, 1 NO. This Harmony XB4, single contact block is pre-assembled on a body/collar fixing unit. This body fixing collar is pre-mounted with a contact block. Simply adding a head to this assembly will provide you with a complete ready-to-use push button. Its wide range of operating temperatures from -40°C to 70°C allows versatility in usage of product. Official Schneider characteristics include Range of product: Harmony XB4; Product or component type: Complete body/contact assembly; Device short name: ZB4; Fixing collar material: Zamak; Sale per indivisible quantity: 1; Head type: Standard; Contacts type and composition: 1 NO; Contact operation: Slow-break. Harmony XB4 devices use a chromium-plated metal bezel and are designed for robust panel operation where clear manual control, indication or machine safety interfaces are required.