Chunky, durable test tubes put serious science safely within reach for young students! Encourages inquiry-based investigation and hands-on observation. Supports serious science experiments. Specifications: - Plastic tubes are safe at temperatures from 10-200F and feature calibration marks (25, 50, 75 and 100 ml) - Includes: 6 test tubes, different coloured lids (to track experiments), sturdy rack and Activity Guide Hand wash (Tubes measure 6"H x 1.5" in diameter). - Grades: Pre-School+ What's in the box Includes: - 6 x Test Tubes with Lids - Test Tube Stand