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Here is the Beta65S frame suitable for these motors.
This is a 7x16mm motor, it does not fit the regular Whoop frames! Only BETAFPV Beta65S frame and Eachine E011 frame fit for these motors for the moment.
Size comparison of all brushed whoop motors from BETAFPV.
4 * 7x16mm 17500KV motors (2CW +2CCW)