1pcs Double Biconcave Lens | 75mm Diameter and 150mm Focal Length ADHD This frog skeleton is fixed

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

Housed in unbreakable case with front clear cover

6 different colored 30 Feet / 9 M spools: Red

(22) Hydrogen - 1 hole

made up of steel which is long lasting

1pcs Double Biconcave Lens | 75mm Diameter and 150mm Focal Length ADHD This frog skeleton is fixedHigh 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