Schneider Electric ZB4BL432 Projecting push button head 40mm, Harmony XB4, metal, red, 22mm, spring return, marked O. This Harmony XB4, projecting red button head operates with a spring return / impulse mechanism. This button head provides an ergonomic interface for controlling your machines. It is easily combined with Harmony range of pushbuttons and contact blocks to perform a large variety of control functions. It is clearly distinguishable visually at a distance thanks to its clear color and marking. 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.