Littlefuse #341-001 panel mount Fuse Holder for all 3AG standard cartridge fuses 1/4" dia. x 1 1/4" long. Fuse Holder mounts in a 0.5" dia hole in panel with supplied nut. Features a screw in secure cap that has slot for a screwdriver to prevent accidental opening! Voltage rating 250V-maximum fuse rating 15Amp. Size 0.48" dia x 2.11" long. Brand New - Retails for up to $20.