Jorgensen Labs Barium Sulfate Suspension 64oz High Contrast Radiographic Contrast Media Brand_SECA these glasses solve the operational Meter Type:Reads in Feet these glasses solve the operational challenge of protecting personnel from multiple infrared wavelengths while maintaining excellent visible light transmission (VLT) the hazards that you can encounter when you're using an aerial lift and the safety standards that you must follow when you're working with or near an aerial lift Versatile Application: Ideal for both routine screenings and complex diagnostic radiographic studies in institutional environments Uniform Coating: Formulated to provide a consistent layer on mucosal surfaces for detailed structural analysis