Standard Features
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| ATA1 | Aluminum shaft with nylon heads for articulate staccato sounds. |
| ATA2 | Aluminum shaft with hard felt head for a full bodied tonal sound. |
| ATA3 | Aluminum shaft with slightly larger acrylic head for fuller sound and more attack. |
| ATA4 | Aluminum shaft with a rubber head for warmer tones, when nylon is too hard and felt is too soft. |
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