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Magnetic rack for DNA, RNA, protein purification, for PCR tubes (100-300 uL) | eBay
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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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Buy Quality High Intensity Magnetic Tubes, Magnetic filter tubes from China