1. According to the use of electrical cabinets, based on two decades of experience in R & D waterproof, anti-fire, anti-insects, anti-wind, lightproof, anti-crash, long service life. 2. Huayuan seal of electrical cabinets are made from ethylene propylene diene monomer (EPDM) rubber 3. with a good flexibility and anti-deformation, anti-aging, ozone, chemical reactions 4. use of a wide temperature range (-40 ~ +120 ) together with the dense foam composite