Recently, our old customer regular ordered 5000 pieces of sucker rod centralizers and 1000 pieces of tubing couplings. This is our company's continuous supply of centralizers and coupling products to the customer for three consecutive years. Our company's sucker rod centralizer has roller type, twist type, snap on type, plug on type and so on. Different types of products can be selected by customers for different well conditions. Our company’s these kinds of centralizers have been exported to different countries for many years and have been unanimously accepted by customers. The order quantity of products is increasing year by year.