OTO Options

The standard OTO ( out to out dimension of the fingerpieces) is approximately 3/4" depending on the particular fingerpiece material used. If you do not specify a different OTO it is assumed that you are ordering the standard 3/4" OTO.

  • The ZN-5 and ZN-5H can be built with either a 1/2" or standard 3/4" OTO.
  • The ZN-9Z series are available in either 5/16" (7.9mm) or 3/8" (9.5mm).
  • The ZN-9 and ZN-9A can be built with 5/16", 3/8", 1/2" or 3/4" OTO.
  • The ZN-QRP is available in either 1/2" or 3/4" OTO.
  • PLEASE SPECIFY OTO WHEN PLACING YOUR ORDER.