Easy to install: With spring fixing, quick assembly; push the spring in or pull it from the opposite side to install the roller into the conveyor frame. With spring fixed bearing: Our roller withstands strict industrial conditions and is suitable for transporting or moving heavy objects. Maximum load capacity: 80 kg / 170 lbs. It has spring bearings inside (shaft diameter: 12 mm). Portable conveyor roller: In a busy workshop, ease of use matters. With the builtin spring, these replacement conveyor belt rollers allow more convenient installation and removal, saving time and energy. You only need to press the spring after receiving the roller and insert it directly. Strong and durable: Zinc coating provides enhanced antirust protection for longlasting use and a like appearance. The rollers operate quietly and with minimal vibration to keep work smooth and efficient. Applications: Suitable for assembly lines handling heavy subassemblies, warehouses or workshops moving heavy crates or equipment, and maintenance areas requiring quick replacement of conveyor rollers. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.