... 3.Type: shear, blind, variable or shaffer 4.Certificate:API 16 Renqiu City Boxin Oil Machinery Accessories ... 7/8, 3-1/2, 4, 4-1/2, 5, 5-1/2, 5-3/4, 6-5/8, 7, ... 9-5/8, 9-7/8 and 10-3/4″), blind, shear and variable RAM (2-7/8 ... to 5, 4-1/2-7”), and double hole RAMPressure: 2 ... 1/16 to 21-1/4"U and S type are availableShear/pipe/blind RAM 4. Certification:For more detail information ...