Integral spiral blade stabilizer 1.Matterial:Alloy steel 2.O.D.Size: 3 7/8" to 28"... 3.Quality standard: API 7-1, SY/T 5051 We supply the integral spiral blade stabilizer, integral straight-rib stabilizer, sleeve replaceable type stabilizer, float valve stabilizer, drilling reamer, unbalanced spiral blade stabilizer and variable-diameter stabilizer, all above products comply with API Spec.7. ...