Bussmann 12.8 are AGC Blade Fuse 1 pk (Pack of 5)

Uses heat build-up to flash circuit on and off. Features an audible click, alerting driver that a directional signal is engaged. Generally used in older model year vehicles. Operates correctly under variable load – flashing the designated vehicle lamps only; or additional lamps; when a trailer is in tow. Does not indicate lamp outage. Cooper Bussmann flasher meet SAE standards and other applicable state and federal guidelines.