Lab Test Tube with Blue Liquid - Scientific Equipment Illustration #304456 (License: Personal Use)

This vector illustration depicts a conical-bottom laboratory test tube made of transparent material, featuring precise volume markings along its side and a secure orange screw-cap. The tube contains a light blue liquid, suggesting a buffered saline, dye solution, or reagent commonly used in assays or diagnostics. Its clean, minimalist design emphasizes clarity and scientific accuracy for educational or commercial use.

Used on science education sites, medical supply catalogs, lab equipment pages, or biology textbook illustrations; matches user intent for visual reference, product listing, or instructional content.