the hoppers made by our company are suitable to load and unload the coal cinder,the cement power and the iron power gran sand soon.it can be designed in rorstard according to the needer .it can be installed on dust catcher,electronic hydraulic door,vibrant supplying material devices and devices.all of these can greatly imprive the working efficiency. otherwise as a manufacture,we have dresgin team ourself,our engineer also can design such hooper,accordhing to your different demand,so if you have any needs or any other question about our product,don't hesitate to contact with me any time,i will try my best to supply the detail information as your demand.