1pcs Double Convex Lens | 75mm Diameter and 100mm Focal Length Earth Worm Model Internally gear-driven motor revolves planets

Internally gear-driven motor revolves planets around the sun in their relative orbits

Our jumbo-size pipes let children get physically active as they build colossal constructions

tenths & twelfths in 9 distinct colors

It is suitable for both indoor/outdoor and can be displayed outside on a fence with the hook and loop fasteners

1pcs Double Convex Lens | 75mm Diameter and 100mm Focal Length Earth Worm Model Internally gear-driven motor revolves planetsHigh Quality Glass: Made from durable and high quality glass, this Double Convex Lens is designed to last and provide accurate and reliable results in a variety of scientific applications. 75mm Diameter: With a diameter of 75mm, this lens is perfect for use in a range of optical experiments, including refraction, reflection, and more. 100mm Focal: Featuring a 100mm focal, this lens is an ideal tool for creating focused images and light beams.