3D printed insert for Shockbottle USPSA boxes to adapt them to IPSC box size (225mm x 150mm x 45mm) for Standard and Classic.  Does not come with USPSA box. Only fits boxes with 'max tol" in the end-engraving (boxes made since 2022).  Colors may vary.  Probably not suitable for match use as its plastic.  Easily removable.