The HW9Z-RL is an anti-rotation ring accessory designed for use with IDEC HW and XW series 22mm switches and pilot devices. This component prevents unintended rotation of selector switches and other rotatable switch elements during operation and installation. The anti-rotation ring is compatible with the full range of HW, TW, and XW series switches and pilot devices, and is used in conjunction with enclosures rated for operating temperatures from -25°C to +60°C and storage temperatures from -40°C to +80°C. It is ideal for industrial control panels and harsh environments where switch stability and reliability are critical, providing a simple mechanical solution to maintain proper switch orientation in high-vibration or high-temperature applications.