This is a Cub cadet Control knob 720-3008. It fits 

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• Cub Cadet H1536 (55AE332R150) - Cub Cadet Commercial Wide-Area Walk-Behind Mower (2003) - Standard Handle Assembly
• Cub Cadet H1536 (55AE332R150) - Cub Cadet Commercial Wide-Area Walk-Behind Mower - Standard Handle Assembly
• Cub Cadet H1536 (55AI4HPR050) - Cub Cadet Commercial Wide-Area Walk-Behind Mower - Handle Assembly
• Cub Cadet H1536 (55AI4HPR750) - Cub Cadet Commercial Wide-Area Walk-Behind Mower - Standard Handle Assembly
• Cub Cadet H1548 (55AE332S150) - Cub Cadet Commercial Wide-Area Walk-Behind Mower (2003) - Standard Handle Assembly
• Cub Cadet H1548 (55AE332S150) - Cub Cadet Commercial Wide-Area Walk-Behind Mower - Standard Handle Assembly
• Cub Cadet H1748 (55AE3D4S150) - Cub Cadet Commercial Wide-Area Walk-Behind Mower (2003) - Standard Handle Assembly
• Cub Cadet H1748 (55AE3D4S750) - Cub Cadet Commercial Wide-Area Walk-Behind Mower - Standard Handle Assembly
• Cub Cadet H1748 (55AI4HPS050) - Cub Cadet Commercial Wide-Area Walk-Behind Mower - Handle Assembly
• Cub Cadet H1748 (55AI4HPS750) - Cub Cadet Commercial Wide-Area Walk-Behind Mower - Standard Handle Assembly
• Cub Cadet H1952 (55AI4HPD050) - Cub Cadet Commercial Wide-Area Walk-Behind Mower - Handle Assembly
• Cub Cadet H1952 (55AI4HPD750) - Cub Cadet Commercial Wide-Area Walk-Behind Mower - Standard Handle Assembly
• Cub Cadet HF1748 (55AF3D4V150) - Cub Cadet Commercial Wide-Area Walk-Behind Mower, 17 HP Kawasaki - Standard Handle Assembly WT
• Cub Cadet HF1954 (55AF3DAW150) - Cub Cadet Commercial Wide-Area Walk-Behind Mower, 19 HP Kawasaki - Standard Handle Assembly WT