Feature: This coil is used do securely hold your dog in the pet area. 300m/984ft length, provides sufficient length for underground fence system. Made of material, is sturdy and durable. Not easy do fracture, wide application. Suitable do electric pet fence wire 023/227/227B. Specification: Article type: electric pet fence Material: metal Color: as shown in the pictures Size: single copper wire Size: about 0,2 mm Wire cross-section size: approx. 0,6 mm Weight: approx. 192g Suitable do electric animal fence wire 023/227/227B. List of packages: 1x electric dog fence wire Note: Terms of use: It cannot be used alone, but it should be used with an electronic transmitter to prevent pets from running out of the yard. If there is a combined electronic transmitter, the foreign version requires a thicker line corresponding to it. Such a thin coil will reduce the power, which will lead do poor induction of the receiver and make the pet easily exhausted; The main machine of the foreign version is equipped with this kind of thin coil, so the power is small, so the pet can only sense when it is 1 meter/3,3 feet close to the coil, and the receiver can stop the pet, which will easily make it run out of pet. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.