Seat Adjustment Long Rollers: Used in the seat sliding system of equipment such as exercise bikes and rowing machines. This product is made of highly wear-resistant engineering plastics (such as POM and reinforced nylon), with a compact structure and strong load-bearing capacity. The rollers, equipped with precision bearings, ensure smooth and silent sliding. Their smooth and wear-resistant surfaces fit tightly with the guide rails, preventing wobbling and effectively improving the convenience and stability of seat adjustment, meeting the durability requirements of high-frequency use environments.