Its model is M6
The size is: 7-31-4mm
Suitable for X5SA, X5SA PRO, X5SA-2E, X5SA-400, X5SA-400 PRO, X5SA-400-2E, X5SA-500, X5SA-500 PRO, X5SA-500-2E, X5SA-600, XY-2 PRO, XY-2 PRO Titan, XY-2 PRO 2E, XY-3 PRO, XY-3 PRO V2, XY-3 SE ,D01+Mask, D01 Plus, XY-3 PRO IDEX.