1pcs Convex Lens | 7.5cm Diameter and 7.5cm Focal Length Stopper Dimensions: 21cm x 20cm x

Dimensions: 21cm x 20cm x 9cm

Input voltage 110/230 Vac

Objective lens: 1 x to 4

Children will love the sound effects they can make up using the wooden agogo

This rain gauge helps you keep track exactly how much water has fallen in your garden

1pcs Convex Lens | 7.5cm Diameter and 7.5cm Focal Length Stopper Dimensions: 21cm x 20cm xHigh Quality Glass: Made from durable and high quality glass, this Convex Lens is designed to last and provide accurate and reliable results in a variety of scientific applications. 7. 5cm Diameter: With a diameter of 7. 5cm, this lens is perfect for use in a range of optical experiments, including refraction, reflection, and more. 7. 5cm Focal: Featuring a 7. 5cm focal, this lens is an ideal tool for creating focused images and light beams.