Skip to product information
1 of 6

Josef Kleir

[CUSTOM] JK (Josef Klier) Exclusive Tenor/Bass Trombone Mouthpiece [Large Shank in Silver]

[CUSTOM] JK (Josef Klier) Exclusive Tenor/Bass Trombone Mouthpiece [Large Shank in Silver]

Regular price $111.10 USD
Regular price Sale price $111.10 USD
Sale Sold out
Shipping calculated at checkout.


Many producers of mouthpieces use model designations, which provide only insufficient information about cup diameter, cup depth and rim contour. At an early stage, Roland Klier noticed the disadvantages of these model designations which resulted for the brass player looking for a mouthpiece.

In 1964, along with the Exclusive Line, he drafted a logical and easy-to-understand system of designation, which enabled the player to recognize all relevant data from the model number at first glance. In addition, he develops a revolutionary concept of combining cup, bore and back bore, allowing the usage of Klier mouthpieces in every musical style.

The exceptionally large selection that the Exclusive Line offered provided every brass player the possibility to find his personal mouthpiece. Moreover, the rim contours of trumpet, cornet and flugelhorn mouthpieces with the same cup diameter are identical. This allows the player to quickly switch without any difficulty.

The unique outer shape of the Exclusive series is the result of numerous tests




which had the aim of elaborating the optimum weight of the mouthpiece. It has established itself as a distinctive feature of the JK Exclusive series. The Exclusive Export Line is an enhancement of the Exclusive series. The rim diameter and shape are identical to those of the Exclusive series, allowing hassle-free switching between the series.


# This is a custom order where you can choose your own size.
It takes approximately 8-12 weeks from the time you place your order.



Trombone – Bass Trombone "Exclusive"

No. rim mm Ø cup mm Ø extremely deep very deep very deep deep medium shallow very shallow extremely shallow extremely shallow

bore mm

8.0 7.6 7.2 6.8 6.4 6.0 5.8 5.8 5.8
PO3 42.0 29.50 03AK 03BK 03A 03B 03C

PO2 41.5 29.00 02AK 02BK 02A 02B 02C

PO1 41.0 28.50 01AK 01BK 01A 01B 01C

P 1 40.5 28.00 1AK 1BK 1A 1B 1C

P 2 40.5 27.50 2AK 2BK 2A 2B 2C

P 3 40.5 27.00 3AK 3BK 3A 3B 3C 3D

P 4 40.0 26.50
4A 4B 4C 4D 4E 4F
P 5 40.0 26.00
5A 5B 5C 5D 5E 5F 5G
P 6 39.0 25.75 6A 6B 6C 6D 6E 6F 6G
P 7 39.0 25.50 7A 7B 7C 7D 7E 7F 7G
P 8 39.0 25.25 8A 8B 8C 8D 8E 8F 8G
P 9 38.0 25.00 9B 9C 9D 9E 9F 9G
P10 38.0 24.50 10B 10C 10D 10E 10F 10G
P12 38.0 24.00 12C 12D 12E 12F 12G
PS C 40.5 28.00 bass trombone "model Cieslik" bore 7.4 mm

AK and BK models can be regarded as bass trombone mouthpieces. F and G models are designed for the alto trombone but in combination with the E cup these models are the perfect choice for Jazz and Lead- trombone players.

Size chart View full details

Materials and care

  • Share information about this garment's materials or features.

  • Include information about its feel or performance.

  • Provide advice on garment storage or care.

  • Consider adding an image to this column for more visual interest.

  • Give laundering instructions including water temperature and recommended drying method.

  • Consider adding an image to this column for more visual interest.

  • Introduce a set of collections that give your customers different ways to browse your products.

  • List your shipping policy

  • Share your domestic shipping prices

  • Share your international shipping prices