replaceable sleeve stabilizer, as per API 7-1 standard. replaceable sleeve stabilizer, we can supply Type: replaceable sleeve Standard: API 7-1 OD: 6" --36" Material: 4145H, 4145H MOD, Non-magnetic material , etc Replaceable Sleeves Stabilizer has the same functions as integral spiral stabilizer. It can be fit for the well in different diameters by changing different sleeves, and also can be extended the service life by replacing the same sleeve. It is one important tool for avoiding the inclined changing of the well. High quality and the soonest delivery. Welcome your inquiry.