The Blender Jug Connection Adapter used to lock the blade group in Braun JB3050 JB3060 blenders and the Braun JB3060 Blender Blade Seal located between the blade and the glass jug provides liquid sealing. If your old connection adapter seal that you use in your device has lost its function and is deformed, you can buy it from Ayserservis with the original product guarantee.