International Light Photo Detector Lot of 2   
Model#- SL-021   
TD#- 13772  
400-800 nm

This is good deal.  This will work or money back. It has been on government shelf for long time- got it from govt. overstock auction  

Filter Numbers:
TD# 13772 on the one and 13705
Y# - 13831     /   TBLU#- 14054

You get both for one money.  

Will ship international.  

please ask questions.  Please look at pictures.