1. This product is necessary for petroleum special steel pipe, and plays the role of thread protection.

2. Product quality: fully in line with SY / t5991-94 industry standards, API industry standards.

3. The surface of the product is smooth, without thread breakage, impurity, slipping, adhesion with thread, suitable for storage at – 46 ℃ to 66 ℃ for more than one year.