This is ‘Black Half Heart/Brain’ hard enamel pin based on my ‘Anatomical Heart’ & ‘Anatomical Brain’ watercolor paintings. Smart & Elegant. Great gift for doctor, for science & medicine lover, for oddity & curiosity collector. Can be used as Halloween Accessories. Backcard is also handmade by me. Pin is made in black color & has silver finish. Comes with 2 rubber & 2 metal butterfly clutches. Locking back aka pinsuranse available in options & coming extra to other backings. Colorful Heart/Brain: https://etsy.me/3xk0qF5 Red Heart/Brain: https://etsy.me/3fte16O White Heart/Brain: https://etsy.me/3xma2iP Set of 2, 3 or 4 Hearts/Brain: https://etsy.me/3xfTitq Shipping Pins will be send as standard priority mail. If you wish to have tracking number please select Tracking Number option in the shipping settings. Size: 3.18 x 3.18 cm or 1.25 x 1.25 inch Colors may slightly vary due to the color calibration of each monitor. Any 2 Anatomy Pins - https://etsy.me/2AA6DoR Full Anatomy Pin set - https://etsy.me/3eKwyZz Mystery Pin set - https://etsy.me/3gT5glU Black Half Heart Brain Hard Enamel Pin Small Anatomical Human Organ, Dark Anatomy Art Valentines Day Gift