Device Size Type Origin
- Main Tube Length 32 Centimeter (52)
- Contact Length 2 Millimeter (51)
- Contact Length 5 Millimeter (43)
- Spacing 5 Millimeter (42)
- Main Tube Length 36 Centimeter (30)
- Recording Depth 37 Millimeter (28)
- Spacing 10 Millimeter (28)
- Recording Depth 55 Millimeter (11)
- Recording Depth 17 Millimeter (8)
- Spacing 7 Millimeter (7)
- Recording Depth 27 Millimeter (6)
- Recording Depth 35 Millimeter (5)
- Recording Depth 44 Millimeter (5)
- Main Tube Length 35 Centimeter (4)
- Recording Depth 15 Millimeter (4)
- Recording Depth 47 Millimeter (4)
- Spacing 3 Millimeter (4)
- Main Tube Length 213 Centimeter (2)
- Main Tube Length 27 Centimeter (2)
- Main Tube Length 30.5 Centimeter (2)
- Recording Depth 25 Millimeter (2)
- Recording Depth 30 Millimeter (2)
- Recording Depth 32 Millimeter (2)
- Recording Depth 40 Millimeter (2)
- Recording Depth 42.5 Millimeter (2)
- Recording Depth 60 Millimeter (2)
- Recording Depth 75 Millimeter (2)
- Recording Depth 95 Millimeter (2)
- Spacing 11 Millimeter (2)
- Spacing 7.5 Millimeter (2)
- Spacing 9 Millimeter (2)
- Main Tube Length 67 Centimeter (1)
- Main Tube Length 85.4 Centimeter (1)
- Recording Depth 93 Millimeter (1)
- Spacing 8 Millimeter (1)