M4 Threaded Diffuse Reflective, Sleeve 40mm R2, 2M, Recommended Replacement f
反射 光学传感器 3.150"（80mm） -
得捷:
SENSOR REFLECTIVE 80MM FBR M4
Allied Electronics:
M4 Threaded Diffuse Reflective; Sleeve 40mm R2; 2M; Recommended Replacement f
Electro Sonic:
Photoelectric Sensor Reflective