? ? ? Product Description ? ? ? API 10D Standards downhole oil well drilling centralizer ? 1. Standard: API 10D 2. OD: 4 1/2"--20"? Our non-welde bow spring casing centralizer is designed and manufactured as per API 10D Standard. High quality can be assured. ? Features: 1) Our non-welded bow spring casing centralizer?is made of spring steel which has been heat teated and hardened tempered to ensure proper and consistent spring characteristics. 2) End collar hinges are folded toward inside. This way will minimize the collar stretch taht tends to occur when centralizers encounter tapers, commonly found in certain type of pipe connections. 3)A reinforcing rib stamped into the end collar. This way will strengthen and preserve it's round configuration during transport. 4)Several different spring bow heights that are available to accommodate most of casing-to -hole configuration. 5)Centralizers with built-in stop devices as well as those of uncommon sizes are available based on request. ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?? ? ? Packaging & Shipping ? ? ? ? Company Information ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ??? ? ? ?