This kind of automatic door bottoms consist of an aluminum case which surrounds a movable drop-bar seal. The drop-bar
seal is actuated by a plunger which contacts the jamb as the door is closing, forcing the drop-bar seal down against the
floor / threshold.
Aluminum Extrusion is made of construction grade Alloy 6630-T5. They are available in mill finish, anodizing in clear, gold,
brown and black, painting in any colors. All vinyl weatherstrips are extruded from cold weather vinyl, which remains flexible
down to -40F.
Available length of 36", 42", 48" or any lengths you want.
Packing: Each with screws bagged and attached in a poly bag, then 25 PCS in a strong master carton to be shipped and
Reshipped.
Advantages
Sound proof
Wind&Dust proof
Cold Air proof
Hot Air proof
Light proof
Insect, Mildew, and Fungus&Vermin proof
Fire Labeled.