Magnetic Field Demo Board (with small magnetic needles) the rotating handle features a

the rotating handle features a circular scale marked in degrees for easy indication

Convenient Features: Includes functions such as Data Hold

this instrument can process experiment about color synthesis

Fine Workmanship: With a simple structure design

Magnetic Field Demo Board (with small magnetic needles) the rotating handle features aMagnetic Field Demo Board (with small magnetic needles). Consists of small magnet needles, used with bar magnet to show magnet field. Premium Quality: This product is made of high grade construction all the way through, excellent build quality and proven reliability across the range. Designed for use in professional laboratories but is an ideal choice for science classrooms and household use. If you need custom order with different sizes design,