collaborated with an office equipment brand to customize precision hardware paper feed rollers for office printers. Using 45# steel to precision process the roller core, matched with a high-wear-resistant rubber surface layer, the paper feed is smooth without jamming, which can effectively avoid paper jams, suitable for papers of different thicknesses (80-200g). The roller core is precisely connected with the bearing, rotating flexibly, and the service life is extended by 3 times. The surface is rust-proof, wear-resistant and easy to clean, suitable for various printer models for home and office use. This customized paper feed roller helped the partner reduce the failure rate of printer products by 70% and increase sales by 38% year-on-year.