Student Thermometer, non-toxic, Dimensions: 2in x 6in, Measure Fahrenheit and Celsius temperatures with these easy to read, Do not immerse in boiling water. Back of thermometer is plastic with hole at top for easy hanging
Pulley Large Demonstration Single, Designed for Classroom Demonstrations, Light-weight, low-friction, and deformation-resistant plastic ensures accurate results, Open to make it easier for users to run pulley cords through them
Double Convex Lens, Highly polished, optically true lens is excellent for physics classroom demonstrations in optics and light refraction, with ground edges, great for physics classrooms, with highest grade, Size: 100 mm focal length, Lens measures 3in diameter, 0.3 weight