The Zeiss Visual Field Replacement Projector Bulb by The Eye-Stuff Group is an essential component for maintaining your Zeiss HFA. Keeping your HFA up to date is crucial for maintaining calibration accuracy. Each bulb has been tested to ensure a maximum projection intensity of less than 10V. The circuits are gold-plated for optimal connectivity and extended protection from corrosion, maximizing their performance over time. This bulb assembly is a direct replacement specifically designed for models 720, 730, 735, 740, 745, 750, 720i, 735i, 740i, 745i, 750i, 830, 840, 850, and 860. In addition, it is a direct replacement for the flashbulb in the Zeiss Stratus 3000. This projector bulb is German-engineered by OSRAM, ensuring that it meets the highest standards of quality and performance. OSRAM is known for its precision and reliability, so you can rest assured that this bulb will fit properly and work seamlessly with your equipment. It is guaranteed to be within the manufacturer's specifications. ESG stands behind all of its products, so if you have any issues or questions, please feel free to contact us anytime.