Small Diameter ASTM 4140 Thick Wall Seamless Alloy Round Steel Tube
Precision Use Carbon Steel Small Diameter Steel Pipe Size Outer Diameter (OD) 6mm Tube Inner Diameter 4.4mm, 5.4mm, 5.5mm, 6.3mm, 6.35mm, 6.8mm
High-precision bright surface thick-walled seamless tube inner diameter 4.4mm, 5.4mm, 5.5mm, 6.3mm, 6.35mm, 6.8mm, 8.03 air gun barrel tube
