Type: Alloy Steel Tube. Material Grade: Grade 4130. Production Standard: ASTM A519. Size: OD 89 mm X 16 mm. Surface Treatment: Oil Painting. Application: For Oil and Gas. Packing: In Bundles or as Your Requirements. Payment Terms:TT/LC, West Union, Paypal and O/A. Delivery Time: 7-25 Days after Receiving the Deposit.