TV-40 3mm [bay-3 M.], PVC tube (cambric) 1m [bay-3 M.]
see technical documentation
Tubes insulating type TV-40 (cambric) are made of polyvinylchloride compound.
They are used at voltages up to 1000 V DC and AC with a frequency of up to 50 Hz.
Tubes TV-40 are designed to protect and isolate the output and mounting wires of electrical equipment and radio equipment - operating temperature from -40C to +70C
Specific volume electrical resistance, not less than 1*10 12 Ohm*cm
Electrical strength, not less than 15.8 kV/mm