| Model | Description |
|---|
| D1 | Deeper bowl shape cup that still provides feedback for control. The ‘D’ cups have smaller version of the Schmitt backbore, tighter to balance the deeper cup. | | D150 | Deeper bowl shape cup in ‘150’ rim diameter. | | D2 | Deeper bowl shape cup in ‘2’ rim diameter. | | D3 | Deeper bowl shape cup in ‘3’ rim diameter. |
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