[15mm] suitable for Garmin Forerunner 235 230 5 620 630 735 [20mm] for Garmin Fenix 5s 6S / 5s plus /6s Pro [22mm] for Garmin Fenix 5 6 forerunner945 935 quatix5 [26mm] for Garmin Fenix 3 5x 6x plus 3 HR sapphire /d2 bravo/quaitx3 /tactix bravo/ descent mk1.
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