Schneider Electric ZB4BH02 Push button head, metal, black, flush, Ø22, push-push, unmarked. This Harmony XB4, flush black button head operates with a latched push-push mechanism. This button head provides an ergonomic interface for controlling your machines. It is easily installed and replaced on compatible complete push button units and contact blocks via snap-fit assembly. It is clearly distinguishable visually at a distance thanks to clear color. It is impact resistant, dust resistant, water resistant and vibration resistant thanks to its IP66. It has a metal bezel, this makes it Ideal for applications requiring high impact and vibration resistance. It is designed to fit in a standard 22mm cutout, ensuring compatibility when installing in pre-existing machinery. 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: Head for non-illuminated push-button; Device short name: ZB4; Bezel material: Chromium plated metal; Mounting diameter: 22.5 mm; Sale per indivisible quantity: 1; Head type: Standard; Shape of signaling unit head: Round. 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.