1 Sample can be sent for your evalution 2 High ,normal ,and low quality to choose 3 Normal quality can run 40,000kms Characteristics:1 Anti Oil , Anti heat2 Long service life3 HIgh effenciency4 No noiseCompetitive advantages:1) Buyers' specifications and customized color of design acceptable2) Green product, absolutely healthy3) Prompt delivery4) High quality control5) Good after service6) ...