After

                             

                              1. can visually see the smudging or leakage of oil.

                               When oil is detected, the surface changes from white to black.

                               You can clearly determine the degree of 'smudge' or 'leakage'.

                             

                              2. Processing and construction are simple.

                              YK-1 is in the shape of a tape with a width of 60 mm × length 500 mm 

                              freely with scissors or cutter knife It can be cut and used.

                   

                              3. It does not confuse oil with moisture.

                              YK1 has a black oil color and a light gray color,

                              You can determine the cause of 'smudge' or 'leakage'.