The merits of the screw mark stick are:

1 Easy to use , left no dyestuff on hands.

2 Using high quality waxes and paraffin oil as the Primary Ingredient.

3 With reasonable price and high quality.

4 Antifouling and anticreep.

Method of using

1.Use the  paintsticks at the rear ends of  the cow in the same pen,paint it about 5cm wide and 15cm long to make a mark.

2.Observe everyday if the mark has been broken off ,it shows that the cow has been mounted and she is ready for artificial insemination .

3.If it doesn't shoe any removal of the cow willl be seen as either sick or non-heating cow,she should receive treatment.