HooAMI Aromatherapy Essential Oil Diffuser Necklace - Stainless Steel Mother Child Locket Pendant Material: stainless steel locket & stainless steel chains & cotton pads Locket Size:Outside diameter:30mm(1 1/8");Thickness:6.5mm; Chain Size:Length:60cm(23 5/8"),Width:2.5mm( 1/8"); Each Aromatherapy Necklace includes 11 multicolored reusable, washable and highly absorbent synthetic felt refill pads. A piece of jewelry made to last a lifetime,and it makes a great unique gift for all essential oil enthusiasts. Strong magnetic closures and solid back,with our Essential Oil Necklace you can enjoy the scent of your favorite essential oil without the oil touching your skin.