Marshall Part No. Tip Length
Porta-8-43-F51II 8" / 203mm
Porta-8-55-F51II 8" / 203mm
Porta-8-72-F51II 8" / 203mm
Porta-12-43-F51II 12" / 305mm
Porta-12-55-F51II 12" / 305mm
Porta-12-72-F51II 12" / 305mm
* 45° or 90°
 
Marshall Part No. Tip Length
Porta-8-43-F53II 8" / 203mm
Porta-8-55-F53II 8" / 203mm
Porta-8-72-F53II 8" / 203mm
Porta-12-43-F53II 12" / 305mm
Porta-12-55-F53II 12" / 305mm
Porta-12-72-F53II 12" / 305mm
* 45° or 90° / Computer Data Logging Enabled