1) Sizes: A) O. D.: 2 3/8" -6 5/8 B) W. T.: 7.11 -10.54mm2) Standard: API Spec 5D, API spec 7 3) Material: E, X, G, S4) Length: R1, R2, R35) Rust prevention treatment, oiled, paint. 6) Protector: according to clients requirment