This Harmony ZB, plastic guard is black. It operates with vertical mounting and can be used in harsh environment. It is compatible with Harmony XB4 and XB5 push buttons. This plastic guard is designed as an accessory for protection of your push buttons. It is compatible with any standard 22mm XB4 and XB5 push button units and is impact resistant, dust resistant, water resistant and vibration resistant thanks to its IP66, making it ideal for operation in harsh environments. This plastic guard is ideal for protection of control and signaling units in harsh environment. Its wide range of operating temperatures from -25°C to 70°C allows versatility in usage of product.