PRICES MAY VARY. Material: made of stainless steel, you don’t worry it tarnish and metal-faded. It is lead free and nickel free. Size: the necklace length is 46cm(18.11inch)+5cm(1.97inch). Science collection necklace-DNA pendant, microscope pendant, molecule pendant and measuring cylinder pendant necklace. Great gift for him/her who interested in Science as well as the spiritual. This necklace will come to you with a velvet bag for gift giving. Dna Necklace, Measuring Cylinder, Science Jewelry, Science Gifts, Y Necklace, Velvet Bag, Necklace Gift, Necklace Length, Scientists