Product buoyancy: about 39g, 47g, 55g, 63g, 71g, 79g, 87g, 95g. The net buoyancy of the product is about -14g, -8g, -2g, 4g, 10g, 16g, 22g, 28g. Stainless Steel Round Knurled Nut with1/4 3/8 M5 Screw Thread D20 Hand-tightened.
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