Techmaster Electronics has the following lab standards available for purchase.
E4440A options 115,122,123,1DS,210,217,226,233,B7J AND BAF.
N1914A option 105
N5532A option 518
All items will come with a 1 year warranty and the E4440A will come with an accredited calibration.
If interested please email me.
[email protected]