Which jews harp is best for a beginner?

Cover

Cover
5. Fastening
Oberton Pro Lab measurements:
Overall dimensions: 0x0x0 mm (?)
13 USD
Shipping: from 3 USD (more...)
Stock: Yes (5+)

best price
warranty
Decorative turned cover, isolating jews harp from the outer world. No fixation. No ventilation. Bigger outer sizes.