Ok, sounds interesting - I want to give it a try!

Price and conditions
One bassoon boost "sleeve" costs 11 euro. The price includes:

• one bassoon boost sleeve
• a set of rubber rings in 5 sizes (10 rings in all).
  

10% discount for 3 or more sleeves.
The shipping is 3,00 euro.

Additional rings costs 0,30 euro a piece, postage is 1 euro (rings only-orders).
You can also buy o-rings directly from www.oringsusa.com, ask for Nitril o-rings, shore 70, sizes 6-10x1mm.

You can pay with credit cards through PayPal or use bank transfer, please see these details

If you have any questions at all then please write me an email: thn@oboetube.com
You can read a few comments from other customers here

Conditions:
Please be aware that there is no guarantee for the success of this refitting procedure. It is presented as a do-it-yourself-if-you-dare 'project'. Not that it is only for true daredevils, but bassoons and bocals differ, peoples' manual skills differ, so a promise that this refit is just perfect for you can't be given.
Refunding:
I'll refund the cost of any parts sent back in their original condition, in case you find out they won't fit either the bocal socket or the bocal.
One condition applies: Refund is only paid through PayPal, not bank transfer.

Lost order: Should the package from me to you get lost in the mail system, I will issue a full refund, not restricted to PayPal. This wil be given upon completed investigation by the post authorities.