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Mouthpiece Chart for Mouthpiece Kits and One Piece Mouthpieces - see here for more information.
Stomvi Mouthpiece Number
Diameter
0.5
17.25mm
0.6
17.15mm
0.7
17.05mm
0.8
16.95mm
0.9
16.85mm
1
16.75mm
2
16.65mm
3
16.45mm
4
16.30mm
5
16.15mm
6
16.05mm
7
15.95mm
8
15.85mm
9
15.75mm
10
15.65mm
11
15.55mm
12
15.45mm
13
15.35mm
14
15.25mm
15
15.15mm
16
15.10mm
17
15.05mm
18
15.00mm
19
14.95mm
20
14.90mm