1pcs Double Biconcave Lens | 75mm Diameter and 150mm Focal Length ADHD 0 to 60 Degree C

0 to 60 Degree C

Housed in unbreakable case with front clear cover

This frog skeleton is fixed on the platen in a natural posture

The cups are easy to clean and maintain

Twist the handle to compress the air

1pcs Double Biconcave Lens | 75mm Diameter and 150mm Focal Length ADHD 0 to 60 Degree CHigh Quality Glass: Made from durable and high quality glass, this Double Biconcave 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. 150mm Focal Length: Featuring a 150mm focal length, this lens is an ideal tool for creating focused images and