For small consumers: set made of PVC-coated steel cord and safety seal made of polycarbonate.
For large consumers (hydrometers with flange): same set as above, plus two hexagonal screws, with W 5/8 thread and central hole, 

diameter 6.5 mm, for fixing the flanges.


Options:

Numbering done in low relief, with a 7-digit numerical sequence, which can be provided in any color, with the name or logo of the interested party.