Made of metal, rubber with a hardness between 70 and 80 Shore, it blocks the water in the tube in different sizes. 

It is installed inside the tube and is activated by the applicator, the diameter of the rubber increases blocking the water in the tube. 

It can be reused 5 to 10 times, depending on handling and stocking care.

Junior: screws and washers in bichromatic steel and other pieces made of brass.

Sizes:

        14 mm - for ½ "easel
        18 mm - for ¾ "easel
        24 mm - for 1 "easel
        1 ½ "
        2"