1.Easy to install: With spring fixing, easy assembly, no more hassle just push the spring in or pull it from the other side, the roller can be easily installed into the conveyor frame. 2.With spring fixed bearing: Our roller can withstand strict and demanding industrial conditions, and is perfect for tasks involving transporting or moving heavy objects. (Maximum load capacity: 80 kg / 170 lbs). It has spring bearings inside (shaft diameter: 12 mm). 3. conveyor roller: In a busy workshop, ease of use is essential; due to the roller's builtin spring, these replacement conveyor belt rollers ensure more convenient installation and removal, saving you unnecessary time and energy. 4.Strong and durable: Our conveyor rollers have a superior surface treatment of zinc coating, which provides enhanced antirust protection, ensuring that you can use it for a long time and it will still look like . And our rollers are quiet in operation and produce minimal vibration, ensuring that your work is smooth and efficient.