1pcs Double Concave Lens | 50mm Diameter and 300mm Focal Length Resistor Box The Optical Bench is one

The Optical Bench is one kind of multi-purpose optical instrument

Supplied with 2 sets of 100g weights

Laminated for protection and long use

With instructions

The set includes a photovoltaic cell

1pcs Double Concave Lens | 50mm Diameter and 300mm Focal Length Resistor Box The Optical Bench is oneHigh Quality Glass: Made from durable and high quality glass, this Double Concave Lens is designed to last and provide accurate and reliable results in a variety of scientific applications. 50mm Diameter: With a diameter of 50mm, 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.