CERO 3D Printed Indicators for Home Switches 4 Fan | 12 Light | 8 Power (Black PLA Plastic). Durable, Light Weight, Black 3D Printed PLA Plastic. Designed for 2 BHK (Bedroom Hall Kitchen). Easy indication of Switch, In dark Can identify the specific switch by touch. ERGONOMIC DESIGN. Works with any brand of switch, use a strong adhesive like Fevi Kwik to stick the indicator.