These domes and tubes are for use with Oticon micro BTE hearing aids, which include:
Corda 1: Syncro / Safran / Go Pro / Tego Pro / Tego
Part number note; there are 'A' and 'B' versions in each size, the A are 'shallow' and B are 'deeper' into the ear canal.
Please note that the Oticon Corda 1 thin tubes are now end of life, the stock we have left available is shown below, perhaps you could use a slighly different size? When they are gone they are gone.
Perhaps buy a spare now while they are still available?
3O58925012
Oticon Corda 1 Slim Micro Tubes 1A L deep insertion for the...
3O58925002
Oticon Corda 1 Slim Micro Tubes 1A R deep insertion for the...
3O58925003
Oticon Corda 1 Slim Micro Tubes 1B R shallow insertion for...
3O58925014
Oticon Corda 1 Slim Micro Tubes 2A L deep insertion for the...
3O58925005
Oticon Corda 1 Slim Micro Tubes 2B R shallow insertion for...