spiral rolling centralizer Specification:4?×5-7/8?, 4-1/2?×6-1/8?, 5?×61/2?, 5-1/2?× 8-1/2?, 7?×8-1/2?,7-5/8?×9-1/2?, 8-5/8?×10-5/8?, 9-5/8?× 12-1/4?, 10-3/4?×14-3/4?, 13-3/8?× 17-1/2?, 16?×20?,20?×26?,ect.
API 5CT Rolling Centralizers