Clasp, magnetic, gunmetal-plated brass, 18x7mm locking round tube with glue-in ends, 5mm inside diameter. Sold per pkg of 2. - Fire Mountain Gems and Beads
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Tube Magnets - Magnetic Tube - Greenwood Magnetics
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CleanMag Magnetic Rack | Paragon Genomics
Magnetic Tubes and Rods, UK | e-Magnets
25 mm Dia Magnetic Rod / Magnetic Tube, Thickness: 100 mm, N40 at Rs 8000/piece in Gurgaon