Colantotte LUCE Necklace is second most powerful model after THEO LUSSO Necklace. It consists 100 - 120 magnets cubes with 100mT per magnet, depending on the size, “Colantotte Necklace LUCE” has magnets embedded in the Colantotte’s unique Alternating North-South Polarity Orientation (ANSPO™). This spreads magnetic force in three dimensions to work on a wide region, improving blood circulation and relieving stiffness in that part of the body. Experience the effects of authentic, medical-certified health gear. Made in Japan. Material: Stainless/ Nylon/ Brass (Rhodium Plating) Size: Medium 43cm/ Large 47cm / LL 51 cm Weight: Medium Approx. 15g/ Large Approx. 16.5g / LL Approx. 18.0g Magnet: 100pcs -120pcs of 100 mT(1000 Gauss) Ferrite Permanent Magnet in Alternating North-South Polarity Orientation (ANSPO™) Medium: 43 cm (100pcs) / Large: 47 cm (110pcs)/ LL: 51 cm (120pcs) Color: Black - matte