Features: 1.Door suction is a supporting products of fire door system, essential accessory for fire door control. 2.With a manual release button, easy to operate, convenient for using. 3.Strong suction, good stability, release without residual magnetic while power failure. 4.Normally keep the fire door open by power supply; release the fire door by controlled power failure during fire; the fire door will be closed under the action of the door closing device. 5.Pure electromagnetic principle, simple structure, firm and durable, not easy to be damaged. 6.With 9.8in chain, suitable for wall mount and floor mount, easy to install, no need complicated tools. Specification: Condition: Brand New_x000D_ Item Type: Fire Door Holder_x000D_ Material: Stainless Steel_x000D_ Color: As picture shown_x000D_ Suction Force: 500N (60KG)_x000D_ Working Current: 160mA/80mA_x000D_ Surface Treatment: Electroplating_x000D_ Suitable For: All Kinds of Single Door, Double Fire Doors_x000D_ Installation: Floor Installation, Wall Installation_x000D_ Chain Length: Approx. 25cm/9.8in _x000D_ Working Mode: Normally keep the fire door open by power supply; release the fire door by controlled power failure during fire; the fire door will be closed by itself under the action of the door closing device PackageList: 1 x Door Suction1 x Accessory Note: Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.