API Oil Casing Pipe 1. Size: 4-1/2''-20'' 2. End Type: BTC LTC STC 3. Steel Grade: J55, K55, N80-1, N80-Q, L80-9Cr/13Cr, C95, P110 ; 4. Specification: API Spec5CT& API 5B 5.Dimensions and their tolerances of tubing round-thread as per API spec 5B Protection of Thread: Thread protector 6.based on the principle of equality and mutual benefit, we provide the products with high quality at competitive price 7. Packing: standard export package 8. Supply Ability:10,000 metric Ton per month 9. Payment Term: L/C, T/T