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Inventories (Tables)
3 Months Ended
Mar. 31, 2020
Inventory Disclosure [Abstract]  
Schedule of Inventories

    US dollars  
    March 31,     December 31,  
    2020     2019  
    (unaudited)        
Raw materials     14,848       18,381  
Work in process     1,618,178       1,541,932  
Finished products     48,833       80,886  
      1,681,859       1,641,199  
Less – provision for slow moving inventory     (1,456,597 )     (1,456,597 )
      225,262       184,602