Made of excellent quality nickel plated steel, not only offer superior conductivity but also enhance durability, effectively extending battery use time.They are designed to fit different battery compartments, suitable for a variety of appliances like remote controls and alarm clocks.Overall Size:16.5x16.0mm / 0.6"x0.6" (L*W);Thickness: 0.3mm / 0.012 ";Plug type: spring contact;Material: Iron, Nickeling;In the package :15 Set x Battery Spring PlateThe spring contact design ensures a stable and reliable connection, withstands repeated compression and expansion, enhancing the functionality of your battery devices.Simply insert the contact plate into the battery compartment, and its ready to use.Ensure the device is turned off before replacing the contact plate to prevent electrical short circuits.