This Harmony ZB, yellow silicone boot has a round shape. It is compatible with Harmony XB4 and XB5 mushroom head push button. This silicone boot is ideal to complement an emergency stop control unit and adapt it to stright hygiene and cleaning requirement of stringent industries. Its clear color allows users to identify it visually at a distance. It is perfectly formed-fit with Harmony mushroom head push buttons and is humidity resistant, dust resistant, water resistant and high pressure resistant thanks to its IP69K, making it ideal for operation in harsh environments. The clear boot prevents growth of bacteria in joints and gaps, this makes it ideal for high hygiene environments.