Schneider Electric ZB4BZ65 Harmony XB4, Padlockable flap for Ø22 flush push button, metal, yellow. This Harmony XB4, padlockable flap is yellow. This padlockable flap is designed as an accessory to cover and protect your pushbuttons from unauthorized operations. It is easily installed and attached to Harmony XB4 and XB5 pushbuttons with flush push units. Secure machine and system operation with padlock, only available to authorized operators. It is designed to fit with a standard 22mm control and signaling units, ensuring compatibility when installing in pre-existing machinery. Official Schneider characteristics include Range of product: Harmony XB5 Harmony XB4; Accessory / separate part designation: Padlockable flap; Accessory / separate part type: Flap; Product or component type: Padlockable flap; Accessory / separate part category: Protection accessories; Accessory / separate part destination: Push-button; Colour: Yellow; Unit Type of Package 1: PCE. 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.