NINGBO NINGHAI IMPORT & EXPORT CO.,LTD Specification:1. Material :Carbon Steel2. Windage:Standard (or small widage),high speed,low noise,low price,high credibility.3. Characters: According to the customers’ request4. Grease: Adopting ordinary grease,or low noisy grease,or paint oil,oil-free5. Holding frame: Iron or Nylon6. Cover: Iron cover could be made the particular process of the spray painting etc.,which has many kinds of various colors.7. Non-Standard Bearing: Meanwhile,we produce many different kinds of the non-standard pulley bearings,insider race is extruded,and outside race is cut the groove,the size of the internal diameter is non-standard etc.8. Purpose: The products are widely used in scooters,skates,shower-room pulley,adornments,slide block trolleys,toys,handcarts,trolley case,fitness equipments,moving-door pulley,automatic mahjong tables,mini electric tools,etc..