The pop-up attachment can be used with any model MaxBP or Sandlot Slugger, depending on your machines date of manufacture (most prior to 2016) you may be required to drill a 1/4" hole, instructions and template are included and we are available by phone to help if need be. Great for defensive practice especially for those 13 and under. No more knots on the head from taking a hard ball off the noggin!