The fittings are composite

The fittings composite are manufactured of glass and basalt fibers with the spiral periodic profile impregnated with polymer. Has a row
advantages in front of steel fittings.
Advantages of fiberglass fittings:
- the increased tensile strength (for example, fittings with a diameter of 8 mm – analog 12-millimetric metal);
- ease (easier metal by 5 times);
- not susceptibility of corrosion;
- resistance to hostile environment;
- not conductivity of electric current (dielectric);
- ability to maintain ultralow temperatures;
- low cost;
- does not create the screen to radio waves.