The manufacturer of Upper fuser roller tells you that the copiers of general models have two upper and lower rollers. The upper roller is mostly hollow inside and has a heating lamp for heating. Efficient conduction of heat. The lower roller is commonly known as "rubber roller", with a metal component in the middle and a thicker, high-temperature-resistant silicone rubber on the outside.

The copier fixing roller is the main device for the copier to fix the copied toner image, and is the key component of the copier's fixing part. It consists of Upper fuser roller and lower fuser roller.
The Upper fuser roller is located on the upper part of the fixing device, and the high temperature required for fixing is conducted by this part and applied to the toner image on the copy paper. It is an aluminum hollow tube with a high temperature resistant (generally around 180 degrees) chemical coating film on its outer layer. The hollow part is used to install the high temperature fixing lamp tube. Other colors, shiny and thinner at the ends, are used to hold and hold drive gears.