Can you write on this causing a magnetic image to appear if you attached a small neodymium magnet to the end of dried up pen?

Only if you have a small enough magnet, otherwise the characters would be so large you could only write one word.After reading "Sadly, no." I tried with a small motor magnet and was able to produce "123" and "Hi" that were legible from the front.Not sure if that is useful for you.

Will this show the tracks on magnetic audio tape?

Not usefully. It might just show some magnetic field on a cleverly recorded tape (eg: Like a lightning flash recorder), but neither the resolution nor the contrast would show normal audio tracks. That is simply not it's function.

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Magnet Source Magnetic Field Viewer Card (Pack of 1)

Magnet Source Magnetic Field Viewer Card (Pack of 1)

Product ID: 335043900

Details

Brand
Master
Colour
Blue
Manufacturer
0
Material
Plastic
Net Quantity
1.0 Count
Number of Packs
1

📏Compact 2.5" x 4" size

🔵Vibrant blue magnetic film

🛡️Durable laminated plastic

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Description

🔵 Unlock the unseen world of magnetism—carry curiosity everywhere!

LAMINATED FOR LONGEVITY - Resistant to wear and tear, built to last through countless magnetic explorations.
MADE IN THE USA QUALITY - Crafted with precision and reliability, supporting trusted domestic manufacturing.
POCKET SIZED MAGNETIC INSIGHT - Carry the power of invisible fields in your wallet or toolkit.
INSTANT MAGNETIC VISUALIZATION - See magnetic fields come alive with the embedded special film.
EDUCATIONAL PROFESSIONAL TOOL - Perfect for STEM enthusiasts, educators, and tech-savvy pros to impress and educate.

The Magnet Source Magnetic Field Viewer Card is a compact, laminated 2.5" x 4" tool featuring a special magnetic film that visually reveals magnetic fields. Designed for durability and portability, this blue card is ideal for educators, professionals, and enthusiasts seeking a hands-on way to explore magnetism. Made in the USA, it combines quality craftsmanship with practical STEM utility.

Specifications

ASIN	B005HYCM8M
Best Sellers Rank	#39,283 in Toys & Games ( See Top 100 in Toys & Games ) #2,758 in School Supplies
Brand	Master Magnetics
Colour	Blue
Country of Origin	USA
Customer Reviews	4.2 4.2 out of 5 stars (196)
Enclosure Material	Plastic
Global Trade Identification Number	00095421005635, 10095421005632
Item Type Name	magnetic
Manufacturer	0
Manufacturer Part Number	DMVC-1BX
Model number	DMVC-1BX
Number of Packs	1
Number of Pieces	1
Shape	Rectangular
Size	2.5 x 4 inch
UPC	095421005635
Unit Count	1.0 Count

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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B/.46

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In stock

Sold byAmazon PanamaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Panama.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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