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and a handheld circular scale
ensuring that they can withstand the rigors of laboratory experiments without bending or breaking easily
The masks have >99% Bacterial Filtration Efficiency (BFE) and >95% 0
Supplied in plastic protective carry case
concentration and constant temperature heating
1pcs Convex Mirror Lens | 50mm Diameter and 200mm Focal Length Cotton and a handheld circular scaleHigh Quality Glass: Made from durable and high quality glass, this Convex Mirror 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 Length: Featuring a 200mm Focal Length, this lens is an ideal tool for creating focused images and light beams.
