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Reading Magnifier, 60mm, 20cm Focal Length Subcategory_Test Strips 5cm brass rotor balanced on

Reading Magnifier, 60mm, 20cm Focal Length Subcategory_Test Strips 5cm brass rotor balanced onChrome plated 60mm reading magnifier extending to a 20cm focal length, the longer focal distance lowering magnification but broadening the visible area on a single page.

SKU: 804236263 · From telecamera-cantiere.com

4.1
USD12.99 USD61.99

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USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Jul 31 - Aug 5

Description

5cm brass rotor balanced on three pairs of adjustable cast-iron pivots

Coulomb's law

Fine-gauge 24 SWG bare copper wire on a 250g reel approximating 375 feet

letting students see conduction-rate differences in one view

Reading Magnifier, 60mm, 20cm Focal Length Subcategory_Test Strips 5cm brass rotor balanced onChrome plated 60mm reading magnifier extending to a 20cm focal length, the longer focal distance lowering magnification but broadening the visible area on a single page.

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