Specification
|    Product model  |      Description  |   
|    BJFMXI  |      Applicable to bottom hole diameter, applicable to valve stem diameter (hand wheel diameter): maximum22mm  |   
|    BJFMX2  |      Applicable to bottom hole diameter, applicable to valve stem diameter (hand wheel diameter): between 23mm and 34mm  |   
|    BJFMX3  |      Applicable to bottom hole diameter, applicable to valve stem diameter [hand wheel diameter): between 44mm-52mm  |   
|    BJFMX4  |      Applicable to bottom hole diameter, applicable to valve stem diameter (hand wheel diameter): between 55mm-62mm  |