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1.5m Length E75 R780 O. D. 50mm Fine Threaded Geological Drill Pipes. API Certified Quality: ISO9001 certified with API logos; strict adherence to API 7-1/7-2 standards. Custom Thread Processing: Accepts double-shoulder and special thread orders; cold rolling available. Flexible Customization: OEM/ODM supported; custom logo, packaging, and graphic options available. Comprehensive Product Range: Supplies full set of drilling tools including pipes, bits, hammers, and rigs. Reliable After-Sales Support: 1-year warranty; free replacement for quality issues; timely assistance. Fast Delivery Options: Standard lead time 10-15 days; flexible terms for small orders.