Inside of the door we use the fire rock like the video ,it can be 30 minutes fireproof .
If want more time for fire prevention can be 40 minutes ,one hour or more we can change the material .
From the video we can see the inside structure,also can check the finishing of the doors,
From check the material to last step when we see the product ,we will have QC to check every process ,if have the problem the product will be stopped and go back to the before step .So all the goods to the customers will be nice .
Also every customer when they place the order we will send the picture and video to them in order to let them know the schedule then can be arrange the shipments.