Thank you for submitting your items for appraisal. These appear to be three chinese han style horse harness Fittings. The material is most likely bronze or pot metal. If they were bought online from a chinese source you can be sure they are new and of decorative value. If they are from an old Collection you will need some proof in writing to be able to sell them and thus follow current laws for cultural protection. There is no measurement for the sentimental value you might attach to it.