The Welch Allyn 3.5 V Finnoff Transilluminator Head (WA41100) is a precision diagnostic light head designed for clear, consistent illumination. Its Halogen HPX lamp delivers bright output with true tissue color, supporting confident clinical assessments. This head-only unit integrates into a Finnoff transilluminator setup for dependable exam lighting in professional clinical settings. A compact, durable choice for upgrading or replacing your veterinary exam light or diagnostic light head.