Colorful Lab Test Tubes with Measurement Rulers - Science Education Illustration #8856 (License: Personal Use)

This vector illustration features four upright test tubes in blue, yellow, purple, and green, each decorated with white polka dots and topped with matching-colored caps. Attached vertically to each tube is a gray ruler marked with black increments, suggesting measurement functionality. The clean black background enhances contrast and focuses attention on the scientific tools.

Used in educational websites, classroom slides, science curriculum materials, or children’s STEM apps to visually represent lab equipment, measurement concepts, or chemistry experiments. Matches user intent for engaging, simplified science visuals.