

Protec Leather Trombone or Euphonium Mouthpiece Pouch Overview
The Protec L204 is a leather mouthpiece pouch designed to protect a single trombone or euphonium mouthpiece during transport and storage, using a full-coverage design, softly padded non-abrasive lining, and a secure magnetic closure in a compact, professional form factor.
Protec L204 Leather Mouthpiece Pouch Specifications
- Trombone or Euphonium mouthpiece pouch
- Capacity: 1 mouthpiece
- Leather exterior: Durable leather with a classic and professional design
- Reinforced stitching: The entire pouch is stitched with high-quality thread made to last
- Magnetic closure: Strong magnetic snap ensures a secure fit
- Lining: Softly padded, non-abrasive lining
Protec L204 Specs & Fit Info
- Fits most trombone and euphonium mouthpieces
- Exterior dimensions: 2.75 in (L) x 1.5 in (W) x 4.8 in (H) (70 x 40 x 125 mm)
- Interior slot storage depth: 3.9 in (98 mm)
- Weight: 1.4oz; 39.7g
Condition
Brand new in original packaging
Who the L204 Trombone/Euphonium Mouthpiece Pouch is For
The Protec L204 is a single-mouthpiece leather pouch for trombone and euphonium players who want secure, full-coverage protection for a mouthpiece in a gig bag, case pocket, or backpack. Its softly padded non-abrasive lining helps prevent cosmetic wear, and the magnetic closure is designed for quick access while keeping the pouch securely closed in transit.
This model is a practical choice for students through professionals who carry one primary mouthpiece and prefer a straightforward, durable leather exterior with reinforced stitching for long-term use. It is also a good fit for players who prioritize responsible materials: Protec states that all materials are tested to be free of Lead, DEHP, PAHS8, DBP, and BBP.
Common Questions about the Protec L204
Will the Protec L204 fit my trombone or euphonium mouthpiece?
The L204 is designed to fit most trombone and euphonium mouthpieces, with an interior slot storage depth of 3.9 in (98 mm). If your mouthpiece is unusually long or has an oversized profile, compare its overall length to the interior depth for best results.
How does the closure work, and is it secure in a bag?
The L204 uses a magnetic snap closure. It is designed to stay closed during normal transport while still allowing quick, one-hand access when you need to swap or store your mouthpiece.
What does “responsibly made” mean for this pouch?
Protec states that the materials used in this pouch are tested to be free of Lead, DEHP, PAHS8, DBP, and BBP.
We are proud to be an authorized Protec dealer
In stock! Ships within 1-2 business days.
30-day risk-free trial
2-Year Warranty
Complimentary shipping for all U.S. orders over $99
Protec L204 Leather Trombone or Euphonium Mouthpiece Pouch
Protec Leather Trombone or Euphonium Mouthpiece Pouch Overview
The Protec L204 is a leather mouthpiece pouch designed to protect a single trombone or euphonium mouthpiece during transport and storage, using a full-coverage design, softly padded non-abrasive lining, and a secure magnetic closure in a compact, professional form factor.
Protec L204 Leather Mouthpiece Pouch Specifications
- Trombone or Euphonium mouthpiece pouch
- Capacity: 1 mouthpiece
- Leather exterior: Durable leather with a classic and professional design
- Reinforced stitching: The entire pouch is stitched with high-quality thread made to last
- Magnetic closure: Strong magnetic snap ensures a secure fit
- Lining: Softly padded, non-abrasive lining
Protec L204 Specs & Fit Info
- Fits most trombone and euphonium mouthpieces
- Exterior dimensions: 2.75 in (L) x 1.5 in (W) x 4.8 in (H) (70 x 40 x 125 mm)
- Interior slot storage depth: 3.9 in (98 mm)
- Weight: 1.4oz; 39.7g
Condition
Brand new in original packaging
Who the L204 Trombone/Euphonium Mouthpiece Pouch is For
The Protec L204 is a single-mouthpiece leather pouch for trombone and euphonium players who want secure, full-coverage protection for a mouthpiece in a gig bag, case pocket, or backpack. Its softly padded non-abrasive lining helps prevent cosmetic wear, and the magnetic closure is designed for quick access while keeping the pouch securely closed in transit.
This model is a practical choice for students through professionals who carry one primary mouthpiece and prefer a straightforward, durable leather exterior with reinforced stitching for long-term use. It is also a good fit for players who prioritize responsible materials: Protec states that all materials are tested to be free of Lead, DEHP, PAHS8, DBP, and BBP.
Common Questions about the Protec L204
Will the Protec L204 fit my trombone or euphonium mouthpiece?
The L204 is designed to fit most trombone and euphonium mouthpieces, with an interior slot storage depth of 3.9 in (98 mm). If your mouthpiece is unusually long or has an oversized profile, compare its overall length to the interior depth for best results.
How does the closure work, and is it secure in a bag?
The L204 uses a magnetic snap closure. It is designed to stay closed during normal transport while still allowing quick, one-hand access when you need to swap or store your mouthpiece.
What does “responsibly made” mean for this pouch?
Protec states that the materials used in this pouch are tested to be free of Lead, DEHP, PAHS8, DBP, and BBP.
We are proud to be an authorized Protec dealer
Pairs well with
In stock! Ships within 1-2 business days.
30-day risk-free trial
2-Year Warranty
Complimentary shipping for all U.S. orders over $99

Protec L204 Leather Trombone or Euphonium Mouthpiece Pouch
If you have any questions, you are always welcome to contact us. We'll get back to you as soon as possible, within 24 hours on weekdays.
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Shipping Information
Orders valued over $99 ship via FedEx 2-Day within the U.S. and via DHL internationally. A physical address (no P.O. Boxes) and signature are required. Smaller accessories ship via USPS (2–5 day service) and do not require a signature if valued under $99. Please see our FAQ for additional details.
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Return Policy
We offer an unconditional 30-day return policy to ensure you’re completely satisfied. If you’re unhappy for any reason, return the item for a full refund or full exchange credit (reeds and other consumables are non-returnable once opened). Every instrument we sell is guaranteed to be free of mechanical defects—if an issue arises, contact us and we’ll either reimburse a local repair or provide a prepaid return label for repair, exchange, or refund. If you simply change your mind, you may still return the item for a full refund, but return shipping costs are the customer’s responsibility unless free returns were purchased through Redo at checkout. Please see our FAQ for additional details.
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Shop Warranty:
Brand new items are covered by the full manufacturer’s warranty unless otherwise noted (see the individual maker for details). Open box, used, and vintage items include a two-year warranty serviced by our in-house repair shop, and we guarantee every instrument will be free of mechanical defects. Warranty coverage does not include damage from accident, misuse, negligence, improper operation, unauthorized alterations or removed serial numbers, normal wear and routine maintenance, environmental damage (including perspiration, corrosion, or extreme temperature and humidity), lacquer or plating wear, or consumable parts such as springs, pads, and felts. Please see our FAQ for additional details.
