Standard GR Trumpet Mouthpieces
| Models | Backbore | Cup Volume | Cup Volume | Cup Diameter r2 | r4 | Rim | ||||
| 62 | Number | Description | Cubic Inches | Inch | mm | Fraction | @.032" | Contour | Bite | Alpha Angle |
| E62S | 1 | Small | .063 | 0.62 | 15.75 | 39.7/64 | .635 | Med. Flat - Wide | Medium Soft | Medium High |
| E62MS | 2 | Medium Small | .067 | 0.62 | 15.75 | 39.7/64 | .635 | Med. Flat - Wide | Medium Soft | Medium High |
| E62M | 2 | Medium | .0695 | 0.62 | 15.75 | 39.7/64 | .635 | Med. Flat - Wide | Medium Soft | Medium High |
| 62Z* | 1 | Small | 0.0583 | 0.62 | 15.75 | 39.7/64 | .629 | Flat Med. - Wide | Medium | High |
| 62Z** | 1 | Small | 0.0588 | 0.62 | 15.75 | 39.7/64 | .633 | Flat Med. - Wide | Soft | High |
| 62SZ | 1 | Small | .0598 | 0.62 | 15.75 | 39.7/64 | .631 | Medium | Medium | Medium High |
| 62S | 1 | Small | .062 | 0.62 | 15.75 | 39.7/64 | .631 | Medium | Medium | Medium High |
| 62MS | 2 | Medium Small | .066 | 0.62 | 15.75 | 39.7/64 | .631 | Medium | Medium | Medium High |
| 62M | 2 | Medium | .068 | 0.62 | 15.75 | 39.7/64 | .631 | Medium | Medium | Medium High |
| Primal 62 | 1 or 2 | Medium Small | .0672 | 0.62 | 15.75 | 39.7/64 | .631 | Medium | Medium | Medium High |
| Primal 62Z | 1 | Small | 0.0637 | 0.62 | 15.75 | 39.7/64 | .631 | Medium | Medium | Medium High |