100pcs/lot IR928-6C-F square side photoelectric crystal infrared emitting light emitting diode 940nm billion light
https://www.vogueparade.com/shopping/EN/150412/1/1005003420804910/100pcslot-ir928-6c-f-square-side-photoelectric-crystal-infrared-emitting-light-emitting-diode-940nm-billion-light//