1. Manufacturing method: ERW, Hot-rolled Seamless 2. Size (OD): 4-1/2", 5", 5-1/2", 6-5/8", 7", 7-5/8", 8-5/8", 9-5/8", 10-3/4", 13-3/8", 16", 18-5/8",20" 3. Grade: J55, K55, N80, L80, C90, C95, P110,Q125 4. API Connections: Round thread(STC and LTC), Buttress thread (BTC) 5. Premium Connections: HCS, TP-CQ 6. Length range: Range 1, 2, 3 7. Technical modifications: Resilient seal (SR 13) with an extra teflon ring seal. Special clearance; For extra clearance applications Special bevel; 20?bevel Slotted