The R121418 with a 1/4" hole is an often requested size that has now been added to our stock inventory. It is a great ring for science experiments and demonstrations. The metal coating is very durable, but ALL Neodymium magnets can chip or shatter. If used gently, these magnets can serve you for a lifetime. WARNING: VERY STRONG MAGNETS. KEEP OUT OF REACH OF ALL CHILDREN. THIS IS NOT A TOY. DO NOT INGEST OR INHALE. DO NOT PUT IN NOSE OR MOUTH. SWALLOWED MAGNETS CAN STICK TO INTESTINES CAUSING SERIOUS INJURY OR DEATH. SEEK IMMEDIATE MEDICAL ATTENTION IF MAGNET(S) ARE SWALLOWED OR INHALED. MAGNETS ARE BRITTLE. BROKEN MAGNETS ARE SHARP. MAGNETIC MEDIA AND ELECTRONIC EQUIPMENT HAZARD. KEEP AWAY FROM PACEMAKERS AND INTERNAL MEDICAL DEVICES. MAGNETIC MATERIAL IS REGULATED FOR AIR TRANSPORT.
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