1） This one is widely used to test the led lamp beads.The crafts on it's surface is the anodizing. So the whole sphere looks very pretty.

 

2） The inside diameter of this one is 50mm,it has three ports.The optical fiber or the optical detector can be fixed on these three ports by the screws.Here attached the picture as reference：

 

3）  Selection of parts

     To meet the different demands of our customers,we provide different coatings and it can

be desgined up to your requirements.