Bull head gold napkin holder rings set of 6

Bull head gold napkin holder rings set of 6 How cute are these! Set of 6 These look and feel like brass type metal but are NOT they are made of some kind of plastic material. (Unknown) Bill heads 2” the napkin opening is -approx 1” x 1.5” See all photos - feel free to ask questions!! some slight wear but they are supposed to have an aged look.. unknown flaws