20mm for Garminf enix7 S / fenix6S /fenix 5s plus/ fenix5s /6s Pro. other sizes for differnt Garmin watch models 26MM Compatible with: Garmin fenix6X/fenix5x/fenix5x plus/fenix3/fenix3 hr/fenix3sapphire /d2 bravo/quaitx3 /tactix bravo/ descent mk1.
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