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This is the best material available for a didgeridoo mouthpiece.
Beeswax is an inert substance, which means it is chemically inactive.
It is virtually impossible for bacteria to grow on beeswax, which is why the world's oldest known culture (that of the Australian Aboriginal) has used it on didgeridoos for thousands of years.
Beeswax mouthpiece makes a much better sealing between your lips and the didgeridoo. It also makes a more comfortable surface for your lips.

Being a natural disinfectant, using a beeswax mouthpiece ensures that your didgeridoo will discourage bacterial activity and reduce the possibility of cross-contamination. Bacteria simply will not thrive in such an environment.
Not using beeswax mouthpiece is health hazard, specially if you share the didgeridoo.
Did you know? 10 pounds of honey yields 1 pound of beeswax

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This Beeswax Mouthpiece can fit any mouthpiece size and shape, even a mouthpiece which is not completely flat/round. As this Beeswax Mouthpiece becomes flexible when warmed, you can form it with your fingers accordingly.
If your mouthpiece is small you can fold the margins of the Beeswax Mouthpiece over the didgeridoo, inside and/or outside.
If your mouthpiece is wide you can press and widen the Beeswax Mouthpiece over the didgeridoo mouthpiece.
Your mouthpiece is not completely flat/round? - No problem, when the Beeswax Mouthpiece is warmed it becomes flexible, then you can shape & well fit it to your mouthpiece.

Instructions:

WARM - Use a hairdryer to warm the underside of the Beeswax mouthpiece (the side that should stick to your didgeridoo). Set the hairdryer on maximum heating and minimum fan. Put the Beeswax mouthpiece on a flat horizontal surface, where its underside faces up. Direct the hairdryer vertically down from a distance of 6" (15cm) to the Beeswax mouthpiece for about 60 seconds (better less than more).
PLACE - When the underside is wet and sticky, place the Beeswax mouthpiece on the cleaned didgeridoo mouthpiece end and press uniformly and gently! Simply press down the beeswax to ensure a good seal!
FIT - Use your finger to press the external and internal sides of the Beeswax mouthpiece on the didgeridoo. Wait 5 minutes for cool down. Now you're done and ready to play!