The Kitchpower 6-quart flex edge beater is compatible with Professional 6 & 600 series stand mixers, including models KD2661X, KP2671X, KP26M1X, KP26M8X, KB26G1X, KL26M8X, KT2651X, KP26N9X, KSM7581, KV25M, 4KB25G, and the KSM7990 (7Qt), as well as Professional 5-Plus series, specifically KV25GOX, KV25G8X, and KV25HOX.
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