Neozed Fuses often called "Bottle" fuses are more compact than Diazed type fuses. Three sizes available, each with a different diameter to fit only into the appropriate screw cap and fuse base. The diameter of the tip matches the diameter of the hole in the adapter ring to insure that no fuse with a higher rating than intended for the circuit can be installed. This prevents damage to the circuit or equipment the fuse protects. Additionally, fuses and adapter rings are color coded to avoid mismatching.