Updated 9 May 2026
| Brand | JK |
| Category | Wind Instruments > Brass Instrument Mouthpieces > Booster for Mouthpieces |
| Available at | 1 UK stores |
| 90-day avg | £31.70 |
JK
JK Adjusting Sleeves Tromb. S1
£31.60Fair Price
Cheapest at Thomann · 1 store
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PRICE HISTORY
Current
£30
Change
+6.6%
Avg
£29
Low
£26
High
£31
Volatility
3.7%
PRODUCT DESCRIPTION
- JK Adjusting Sleeves Tromb. Excl
- Adjustment Ring for JK Exclusive Trombone Mouthpiece
- The sound becomes stronger and more centred
- Silver-plated