Microscope Hard Enamel Keyring, Science, Chemistry, Biology, Forensic, Lab, Doctor Fun and quirky pin & keyring designed by an escape room enthusiast, puzzle lover and true crime fanatic Keyring details: Type: Hard Enamel Material: Nickel Sizes: 35 mm Please allow for minor variations in colour due to picture and monitor resolution - Items are not sent via tracked post. However, the shipping method can be upgraded to registered post (includes tracking number) at the checkout.