1. Seamless precision steel tube
2. Standrad&material: ASTM A519 SAE1010, SAE1020, SAE1035, SAE1045, SAE4130, SAE4140, DIN2391 ST35, ST45, ST52, EN10305-1 E215, E235, E355, 25CrMo4, 42CrMo4, and equivalent standard&material.
3. Size range: OD: 6mm-133mm Wall Thickness: 0.8mm-12mm
4. Delivery condition: BKS, BKW, BK, GBK(annealing), NBK(normalizing&protective normazling).
5. Packing: At seller's option or as per requirements of customers.
6. Oil-coating, varnish, or end-protection by plastic caps.