The BSLMNT2 (Base Station Mount Kit) are for BSLXL series base station antennas. The mount consists of 2-BSLMNT1 mounts each with 3 extruded aluminum brackets and 1 long stainless steel V bolt that will handle a 2 3/8″ diameter mast.
For more details, please see the BSLMNT2 Spec Sheet.