20 inch or 114.3mm to 508mmwall thicknessaccording to api 5ct standardlengthtubingr1 (6.10m to 7.32m), r2 (8.53m to 9.75m), r3 (11.58m to 12.80m)casingr1 (4.88m to 7.62m), r2 (7.62m to 10.36m), r3 (10.36m to 14.63m)typeseamlessend-finishtubingp, i, n, ucasingp, s, b, lwe ...