The 10x5x1mm rare earth block bar magnet has a holding force of ~1 pound & a surface gauss of over 1700; from $0.28.
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The Mark I Magnaprobe can respond to as little as 0.3 gauss & will detect weaknesses in magnetic shielding. The Mark II Magnaprobe is a fast & convenient way to confirm magnet are positioned with their poles pointing correctly.
See What are Customers are saying in Google Reviews about this magnet:
SKU:44227-1; Size:10 x 5 x 1
|Field Strength (Gauss) & Pull Force in Pounds & Kilograms at 5 Distances Above Magnet|