Alpine Fogger/Mister Disk Maintenance Kit (20mm disk), FGDR1 SPK01 K001 CE-12669 Replacement teflon coated ultrasonic disk for Alpine pond foggers / indoor misters Replacement for FG202LR, FG203LR, FG101, FG101L, FG102, FG104LWC Replaces other brands using a 20mm (nickel size) ultrasonic disk Includes disk, rubber gasket seal and tool Disk life is up to 3000 hours