This Harmony XB4, padlockable flap is black. 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.