Small black code 35*29CM Easy Installation: Pay attention to the precautions, prepare the necessary tools, and install it easily according to your needs. The tunnel depth can be reduced depending on your installation needs. PET FREEDOM: Provide the owner with the ultimate convenience, the original pet door allows your pet to come and go freely. Newest Product: Hold the brush strip securely. Even if the brush comes off, it is easy to put it back in the retention slot. This greatly helps the brush bar to make as little noise as possible and deter pests such as raindrops, wind or mosquitoes.