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Ships within 48 hours · Estimated delivery Aug 6 - Aug 11
A pin can be easily pressed with the use of the hand only
Great for mental mathematics with negative numbers
This model visually demonstrates how a 4 Strokes gasoline engine operates
Powder-Free
Each Key length: 11cm - 29 cm (4
1pcs Concave Mirror Lens | 75mm Diameter and 100mm Focal Length Teeth Model A pin can be easilyHigh Quality Glass: Made from durable and high quality glass, this Concave Mirror 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. 100mm Focal: Featuring a 100mm focal, this lens is an ideal tool for creating focused images and light beams.
