Ductile environmental manhole cover

1. Its made of QT 500-7, 25 characterized with no deformation, no cracking, which has passed the standard test of CT/T3012-1993. 2. Its contact surface has been machinery processed to prevent the manhole cover from jumping, ringing, displacing and falling. 3. With the electrostatic spraying technique, its surface will be durably colorful personalized with anti-UV, water-proof, and anti-aging. Also, any professional picture, name and customer service phone can be designed according to our customers. 4. Based on the anti-theft hinges, it has been added five new anti-open devices to satisfy our customer which are all of our patents. These five devices are far-infrared remote control device, permanent magnet lock device, pressure locking device, secret code lock and mechanical locking device. All of them are associated with dedicated keys made of stainless steel and brass, which is not only convenient but safe. Please feel free to contact with us any time! We are looking forward to cooperating with you by all of our heart!May long friendship between us!