Updated 6 May 2026
| Brand | JK |
| Category | Wind Instruments > Brass Instrument Mouthpieces > Booster for Mouthpieces |
| Available at | 1 UK stores |
| 90-day avg | £30.80 |
JK
JK Adjusting Sleeves Flgh. US
£30.70Fair Price
Cheapest at Thomann · 1 store
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PRICE HISTORY
Current
£28
Change
+17.0%
Avg
£26
Low
£23
High
£28
Volatility
5.3%
PRODUCT DESCRIPTION
- JK Adjusting Sleeves Flgh. US
- Adjustment Ring for Flugelhorn Mouthpiece with American Shank
- The sound becomes stronger and more centred
- Silver-plated