Primary Secondary Coil

Marsoni

M251S

$10.72

Get it in 3 business days with 1 day shipping. Friday, May 29

Primary Secondary CoilPhysical laboratory aid tools make learning of physical experiments more efficient. Easy to use, can be used on rod magnets, ammeters, sliding baristers and other equipment. Lightweight and portable, the electromagnetic induction spiral coil is specialized in electromagnetic induction phenomenon, convenient to carry and use. It is designed to demonstrate electromagnetic induction and validate the Law of Rentz for students. Ideal choice for physical

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We offer a 30-day return/exchange service after receiving.
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Very happy with this car mount. The magnet is plenty strong to securely hold my iPhone in its magnetic loop case. It’s plastic but it’s sturdy and fits on my Model 3’s screen perfectly. It has an adjustable height that I can mount my phone with full clearance of my steering wheel. Don’t waste your money on a metal mount, this inexpensive mount serves the need perfectly.

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Reviewed in the United States on April 22, 2026

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Anthony Jones

Lowell, US

★★★★★ 5

Great for Tesla

Color: Black

Perfect in my Tesla. It’s sturdy and never drops my phone.

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Reviewed in the United States on May 23, 2026

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WillB

Port Orchard, US

★★★★★ 1

Mount presses on the back of the screen Too hard

Color: Black

Waste of time. Doesn’t mount well. The screen shows visible backlight stress from where the mount presses on the back of the screen Returning it same day

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Reviewed in the United States on May 13, 2026

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I Agoren

Birmingham, US

★★★★★ 5

Good option for FSD drivers with a thin skin

Color: Black

Works great. Holds the phone very well and can be repositioned very quickly to accommodate various driving modes like laid back and deep or focus edge of your seat with getting yelled at by FSD (not really self driving)

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Reviewed in the United States on June 1, 2026

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As unique ink

Phoenix, US

★★★★★ 4

Easy install

Color: Black

Sometimes it falls off if you hit a bump but it’s very durable. Functions well. Magnetic strength is impeccable. Easy installation

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Reviewed in the United States on April 21, 2026