Off Set Bow Centralizer Off Set Bows Centralizers are engineered with a tightly toleranced ID that gives a precise sliding fit onto API specification casing. By manufacturing these centralizers in this way, the stand-off performance can be significantly improved, especially in tight annular applications where every millimeter counts. If you have any question on casing centralizer, composite centralizer, hinged welded centralizer, aluminum spiral vane solid rigid centralizer and bow spring centralizer etc. We will give the professional answers to you.