Oster® 5 Speed Hand Mixer, Black Replacement Parts
https://www.oster.com/parts-and-accessories/mixers/oster-5-speed-hand-mixer-black-replacement-parts/FPSTHM2500B_Parts.html
FPSTHM2500B_Parts
$2.99
Products

Beater for Oster Hand Mixer
111838-000-000
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This item is currently not available online.