Round Bottom Flask Chemistry Hard Enamel Pin, Science, Biology, Forensic, Lab, Doctor, Bunsen Burner Fun and quirky pins designed by an escape room enthusiast, puzzle lover, true crime fanatic and forensic scientist in training Pin details: Type: Hard Enamel Backing: 1 Rubber clutch Material: Nickel Size: 35 mm Please allow for minor variations in colour due to picture and monitor resolution If you have selected a set of pins please write in the comments box which colours you would prefer (red, yellow, orange, green, blue, purple or pink) - Items are not sent via tracked post. However, the shipping method can be upgraded to registered post (includes tracking number) at the checkout.