1pcs Double Convex Lens | 75mm Diameter and 300mm Focal Length Cylinders A lightweight dumbbell allows children

A lightweight dumbbell allows children to mimic real exercises safely

Voltage (V): 220V 50Hz

Rectangular hole diffraction

Included: 2 x Nylon-Reinforced Measuring Tape one meter length and One Manual

1pcs Double Convex Lens | 75mm Diameter and 300mm Focal Length Cylinders A lightweight dumbbell allows childrenHigh 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. 300mm Focal: Featuring a 300mm focal, this lens is an ideal tool for creating focused images and light beams.