These high-quality Replacement Ring Magnets are essential for maintaining the integrity and functionality of your Universal V1-Pucks and SSRL Sample Storage Cassettes. Each magnet is crafted from durable nickel-coated NdFeB (Neodymium-Iron-Boron), ensuring strong and reliable magnetic force for securely holding samples in their designated ports. Measuring precisely 10.4 mm outer diameter, 7.6 mm inner diameter, and 2.5 mm thickness, these ring magnets provide an exact fit for compatible equipment. They are designed to be held firmly in place by removable polycarbonate washers, enabling easy replacement as needed. Ensuring proper magnetic strength is crucial for preventing sample loss and maintaining sample integrity within cryogenic environments. This 100-pack provides ample supply for routine maintenance, supporting continuous and secure sample management in various laboratory settings.