1,low noise, good lubrication. 2,long working life. 3, promptly deliver ... /L B: 100% L/C At Sight ApplicationHome appliances, low noise and high speed electric motors, automotive components, pumps, machinery. ServiceOEM ... test5.Greasing and gland6.Noise inspection7.Appearance inspection8.Rust prevention9.Product packaging Marginal lubricating bush for motors, fan, jars, blenders and other appliances