1This product is a light grating security device, which is made of quality plastic. 2Made of tough and steady material, durable, can serve a long time. 3It has fast reaction, resistant to shock. 4Easy to install and detach, convenient for you to use. 5Suitable for forging machines, automatic equipment, shearing machines, hydraulic machines, and area theft prevention. Features: This product is a light grating security device, which is made of quality plastic. Made of tough and steady material, durable, can serve a long time. It has fast reaction, resistant to shock. Easy to install and detach, convenient for you to use. Suitable for forging machines, automatic equipment, shearing machines, hydraulic machines, and area theft prevention. Specifications: Model:BEM0840-30NB Material: plastic Color: as picture shown Output Mode: NPN-NC Voltage: 24VDC Light Beam Number: 8 Light Point Distance: 40mm/1.57in Protect Height: 200mm/7.87in Total Height: 359mm/14.13in Weight: Approx. 1048g Package List: 1 Pack * Screws & Mounting Bracket 2 * Connecting Line 1 * Grating Transmitter 1 *Grating Receiver