High Hardness Alloy Steel Casing Pipe for Mining / Water Well , 3 meter length DCDMA-BS casing tubes DCDMA-BS casing tubes Steel Waterwell Casing Drill Pipe Casing For Mining , Flush-jointed Water Well Casings 4" - 12" Drill Pipe Casing For Mining , Flush-jointed Water Well Casings 4" - 12" 3 meter length Product Description: Features: High Precision, High Hardness, Corrosion Resistant Material: Alloy Steel Technique: Cold Rolled Product Name: Drill Pipe Casing Usage: Well