1.Shell material: 430 Stainless steel 2.Zinc alloy latch/emergency lever 3.Switch: Omron from Japan Imported piano wire torsion spring PVC tube protects the wirings. 4.Size:59*72.5*13.5mm 5.Weight:174g 6.Working voltage:12V/2A & 24V/0.8A Features 1.Solenoid driven 2.Without push lever 3.Small thrust to push the door 4.Lock hook detection function 5.Mechanical emergency lever