Product Name: 40Cr Steel Sucker Rod Coupling
Design Standard: API 11B
Material: 40Cr Steel
Size: 1 Inch * 7/8 Inch
Coating: Non-Metallic Phosphate Coating
Thread: 7/8 Inch API Box to 1 Inch API Box
Source: https://www.landeepipefitting.com/40cr-steel-sucker-rod-coupling-api-11b-1-7-8-in-threaded.html
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