Compatible 20mm:
For Huawei Watch GT2 3 42mm
For Huawei Honor Watch ES
For Garmin Forerunner 55 158 165
For Garmin Forerunner 645/645 Music
For Garmin Forerunner 245/245 Music
For Garmin Forerunner 570 42mm
For Garmin Venu/Venu 2 Plus (43MM)
For Garmin Venu SQ/SQ2/SQMusic/SQ2Music
For Garmin Active 5 6
For GarminMove 3
For GarminMove Luxe
For GarminMove Style
For Garmin Vivomove HR
For Garmin Vivoactive 3/3 Music
For Garmin Approach S12/S40/S42/S50
For GarminMove Trend
For Garmin Vivoactive 5
For Garmin Vivoactive 6 
For Garmin Approach S70 42mm
Compatible 22mm:
or Garmin Forerunner 265/265Music
For Garmin Forerunner 255/255Music
For Garmin Forerunner 970
For Garmin Forerunner 570 47mm
For Garmin Vivoactive 4
For Garmin Venu 4 45mm
For Garmin Venu 2 3
For Garmin Active
For Garmin Darth Vader
For Garmin First Avenger
For Garmin Forerunner 745 965
For Garmin fenix Chronos
For Garmin Approach S70 47mm
2.Package:just the band ,no the watch