Image intensifier tube 33-4 HDR-A (P#7021681) 7021681 Category: Siemens Healthcare Low Prices Price match guarantee Guaranteed Fitment. Always the correct part In-House Experts. We know our products Easy Returns. Quick & Hassle Free 7021681 – Image intensifier tube 33-4 HDR-A Description Description Image intensifier tube 33-4 HDR-A