Tops of Acrylic, Lexan, or Delrin with Brass Shell
A top is made where the rim and cup are plastic* with a brass shell fixed to the outside. The result is a plastic* rim and cup with the qualities they offer, but with the extra 'brass-ness' of the brass shell. These take a plastic* top and get it much closer to playing like a brass top.
Acrylic plays the most like brass. If you are looking for a plastic top with brass-like qualities, go with Acrylic.
Lexan has more 'grip' than silver plated brass or Acrylic.
Delrin has less 'grip' and feels softer and more slippery than silver plated brass or Acrylic.
There are two options with the shells:
1. The shell is below the rim. This way the entire outer of the rim is plastic. This prevents the lips touching metal when releasing the spit valve. Or, if you want some metal, but not as much as a shell that is partial rim (the blue acrylic top in pictures below).
2. The shell extends halfway up the rim. This has more metal than the below the rim shell, but your lips may touch the metal when releasing the spit valve (the clear acrylic top in pictures below).
*Acrylic, Lexan, Delrin
Tops are compatible with other manufacturers with "Warburton Threads."
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| Marking |
Description |
| S |
The standard rim shape in the FCB line. A comfortable shape with a mild bite, excellent articulation, flexability, and endurance. |
| O |
An "orchestral" rim shape with more (sharper) bite than the "S" rim, a "1X" style. |
| W |
Similar to the Standard rim, but slightly wider. |
| P |
Designed for use with the "P" cup for piccolo. A comfortable and broad shape that aids the upper register. It also works great as a lead rim. |
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| Marking |
Description |
| D |
A deep cup, very dark on trumpet, great for cornet. |
| MD |
A deep B cup with a "deepened C shape" and not a "V" shape. Great on rotary or as a deeper orchestral cup. |
| 5B |
A B type cup based on a Mt Vernon 5B. This is popular with 1 to 1 1/2 size rims for orchestral/classical playing. |
| MVD |
A traditional "C" type cup shape based on a Bach Mt Vernon 1 1/4C cup. This is the most popular orchestral cup. |
| MV |
A traditional "C" type cup shape great for all-around playing. |
| MC |
An efficient cup with a quick response and vibrant sound. Described by clients as a super charged 3C cup, it has a steeper initial slope with a flatter bowl. |
| M |
Shallower than MC cup and versatile; a shallow "C" type cup. |
| MS |
A shallower version of the M cup, a "D" type cup; facilitates a lighter sound, and easier upper register. |
| S |
A very shallow and flat "E" type cup. |
| P |
Designed to work with the "P" rim for use on piccolo and for lead. More of a "V" shape than the M cup. |
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| Size |
Diameter |
Rim |
Cup |
Backbore |
Equivalent Feel
D, MD, MV,
S, M, MS, S
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Equivalent Feel
P |
| 1 |
0.650 |
S, O, W |
D, MD, MVD,
MV, MC, M, MS, S
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1, 2, 3, 5, 6, 7,MTV, 8, 9, 10, 11 |
1 |
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| 2 |
0.645 |
S, O, W |
D, MD, MVD,
MV, MC, M, MS, S
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1, 2, 3, 5, 6, 7, MTV, 8, 9, 10, 11 |
1 1/4 |
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| 3 |
0.640 |
S, O, W |
D, MD, MVD,
MV, MC, M, MS, S
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1, 2, 3, 5, 6, 7, MTV, 8, 9, 10, 11 |
1 1/4 |
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| 4 |
0.635 |
S, O, W |
D, MD, MVD,
MV, MC, M, MS, S
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1, 2, 3, 5, 6, 7, MTV, 8, 9, 10, 11 |
1 1/2 |
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| 5 |
0.630 |
S, O, W, P |
D, MD, MVD,
MV, MC, M, MS, S, P
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1, 2, 3, 5, 6, 7, MTV, 8, 9, 10, 11 |
1 1/2, 3 |
1P |
| 6 |
0.625 |
S,O, W, P |
D, MD, MVD,
MV, MC, M, MS, S, P
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1, 2, 3, 5, 6, 7, MTV, 8, 9, 10, 11 |
3, 5, 6, 7 |
1 1/4P |
| 7 |
0.620 |
S, O, W, P |
D, MD, MVD,
MV, MC, M, MS, S, P
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1, 2, 3, 5, 6, 7, MTV, 8, 9, 10, 11 |
10 1/2 |
1 1/4P |
| 8 |
0.610 |
P, S, W |
P, S, MS, M |
1, 2, 3, 5, 11 |
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1 1/2P, 15A4a |
| 9 |
0.600 |
P, S, W |
P, S, MS, M |
1, 2, 3, 5, 11 |
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3P, 14A4a |
| 10 |
0.590 |
P, S, W |
P, S, MS, M |
1, 2, 3, 5, 11 |
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10 1/2P, 13A4a |
| 11 |
0.580 |
P, S, W |
P, S, MS, M |
1, 2, 3, 5, 11 |
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6A4a |
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