1pcs Double Concave Lens | 50mm Diameter and 200mm Focal Length Face Mask Dimensions: L 15 in x

Dimensions: L 15 in x W 7

Clear Test Tubes: 40ml x 20pcs

and protection during surgical procedures

Included: 20 packs of chipboard base 10 pieces (each with 20 ones

Set of 4 Lenses

1pcs Double Concave Lens | 50mm Diameter and 200mm Focal Length Face Mask Dimensions: L 15 in xHigh 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. 200mm Focal: Featuring a 200mm focal, this lens is an ideal tool for creating focused images and light beams.