Trion:Z bracelets bring the power of minus ions and twin 1,000 gauss therapeutic magnets * Trion:Z bracelets use two 1,000 gauss therapeutic medical grade magnets, * North-South Polarity (ANSPO) matrix that increases the effectiveness * Available in 3 sizes: Small 16cm (6.3"), Medium 18cm (7.1"), Large 20cm (7.9")