Product material: The shell is formed by sheet metal, and the internal parts are precision cast from carbon steel. Working mode: (locking when the door is closed when it is off, unlocking is triggered when it is on) Mechanical life: under designed load conditions, more than 500,000 times Surface treatment: design load plating electrophoretic paint (neutral smoke test for more than 500 hours) ambient temperature: This product is suitable for high temperature +60 degrees, low temperature -40 degrees ambient temperature. Safety: The lock hook can withstand 150kg of pulling force without obvious permanent deformation; it has vibration and bending resistance Product installation: The product is small in size, easy to install, no left and right, positive and negative; and a mechanical emergency unlocking position is reserved Electromagnet life: more than 1,000,000 under rated working conditions Self-elastic design: adjustable elasticity, suitable for self-elastic doors weighing 0.5-4kg Colour: black Material: Metal Package Contents: 2 set x Electromagnetic package lock, Only the above package lock. other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.