Retrieve Managed Metadata Field Value Using REST

Hi all,

In SharePoint list there is one managed metadata column with name ProductType, which uses specific term set to allow users to add product type of each item.

I wnat to get all product type which is allowed users to add in managed metadata column when he add new item in list.

I am using REST Services, Please help me if anyone knows that ho can we access Managed Metadata Field Value Using REST.

Please help and i will be happy to explain further if someone not understand my requirements.

I will be so so thankful to you.