1. Sealing Strip: EPDM material production, its Chemical resistance stability is good, durable prevent ageing.
2. Door Board: Using Polyurethane foam with panel overall, exterior level off, insulation performance is strong, plus box shell, the more enhance the overall effect.
3. Door Frame: Using aluminum alloy production, appearance is neat and easy, durable, and matches since limit temperature electric tropical, do not need artificial temperature
4. Guide Rail: Guide rail's material is Aluminum alloy, wheel is working on lining and inclined rail, when start the door, the wheel can separate door and door frame.

Specifications:
1. Good Seal ability.
2. Elect Heating wire around doorframe to avoid icing.
3. Size can be customized.