1. It is used to prevent the door crack from entering the outside gas, dust, etc. It is mainly used for the indoor temperature and air in winter and summer to be affected by the outside world, which can achieve energy saving and sanitation effects.

2. Prevent outdoor cold air intrusion in winter and save greenhouse costs.

Prevent air conditioning cold air loss in summer and achieve energy saving effect.

Prevent outdoor yellow sand and dust from penetrating and keep the environment clean.

Prevent mosquitoes, flies and other pests from entering and prevent all kinds of diseases from spreading.

Prevent outdoor noise infiltration, reduce noise and keep quiet.

Reduce the impact force of the switch door and the sound generated during the impact.