The "no-shatter" fuse.
This ceramic fuse is rated 0.5-amp 250V to protect equipment from short circuits and power surges. It's the fuse used in many multimeters. It has a higher interrupting rating, meaning it's capable of withstanding a higher short-circuit current, and it's UL-recognized. The body is ceramic, so it won't shatter when the fuse blows. Package of two 5x20mm fuses.