Guy's Magnets 11.4 mm x 8.4 mm x 1.3 mm bonded Samarium Cobalt ring

Technical Specifications Outer Diameter: 11.4mm (0.55") Inner Diameter: 8.4mm (") Thickness: 1.3mm (0.19") Magnetised through the thickness so that one flat face is north and the other is south Weight: 0.5g Grade: SYBG10 Coating: None Maximum Temp: 100°C / 2122°F Theoretical Maximum Pull: 0.09lb / 1.4oz / 40g Calculated Max Vertical Hold-guidance only: 0.018lb / 0.28oz / 8g WARNINGS: All samarium cobalt magnets are unsuitable for children; do not ingest. All samarium cobalt magnets are brittle; do not allow these magnets to jump together or to an iron/steel surface - they will break, crack, chip or shatter. Thin samarium cobalt magnets DO NOT FLEX, if you attempt to flex them they will snap in half.