3mm Non-Threaded, Coaxial Diffuse Reflective, R1, 2M, Recommended Replacement
反射 光学传感器 5.9"（15cm） -
得捷:
SENSOR REFLECTIVE 15CM R1 COAX
Allied Electronics:
3mm Non-Threaded, Coaxial Diffuse Reflective, R1, 2M, Recommended Replacement
Electro Sonic:
Photoelectric Sensor Reflective