This listing is for a Bausch & Lomb Microscope Illuminator Transformer 
Model: 31-35-28 

Specifications:
Brand: Bausch & Lomb
Type: Microscope Illuminator Transformer
Condition: Used
Primary: 120 V. 50/60 Hz 25 Watts
Secondary: 3.9-6.6 Volts 
For Illuminators : 31-32-42, 31-33-34,
31-33-35, 31-33-04,
31-33-60, 31-34-28,
31-33-39
Made in USA 
Weight: 5.01 lb

This item is exactly as pictured.