1-1/ 8 " FS API Class SM coupling 1-Type: SM FS coupling New: Both-way Protection Globoidal Coupling Full size SM coupling with big chamfer 2-Material: Carbon steel AISI 5I40 3-Spray Material Ni60A Alloy Coating 4-Basic Hardness: HRC 16-23 5-Surface Hardness: HRC 55-62 6-Hole rate: 2% 7-Min. Hardness of the layer: 595HV0.2 8-Standard: API Spec 11B 9-Coupling diameter: 1 -1/ 8" 10-Weight: 1.29 KG/ Pcs 11-Package: wooden cases 12-Payment Terms: T/ T