1. They can increase milk yield,reproductive rate and promote digestion .
2.They are made of high pressure and nonbreakable.

The salt licks for livestocks is made of salt ,and make it full of many kinds of mineral nutritions by 150Mpa/m2 pressure.The livestocks can get enough nutritions by licking the salt licks everyday and this kind of mineral nutritions can bot supplied by the ordinary feed.The salt licks can avoid being wasted with the high density,hardness,wind resistance,sun resistance and rain resistance.The herdsman need not to learn additional knowledge to use it and just put the licks on the place where the animals can eat.

After testing,we find that by using this licks,the livestocks can really improve a lot,such as the high milk yield ,high reproductive rate,and promoting digestion .