100% Physical and Electrical testing.
A minimum of 3 layers of PTFE Tape, wrapped and sintered, provides balanced bi- axially oriented, concentrically placed insulation.
Minimum shrinkage / deformation and no 'run-away' problem at soldering-iron temperatures.
Certified minimum BREAK DOWN VOLTAGE to ensure higher, uniform and predictable performance.
Controlled tighter tolerance on weight, PTFE density and conductor resistance.
Test voltages for the three common working voltages are:
| Type Working Voltage ACRMS | Dielectric Test Voltage for 1 Minute | Sparktest Voltage for 1 Second |
| ET 250 | 1500 | 2500 |
| E 600 | 2000 | 3400 |
| EE 1000 | 3000 | 5000 |