Cattle Ear Tags . 1.It is made of polyurethane. 2.Features: Good flexibility, 3.Aging resistance, Long life ISO Certified 1. Cattle Ear Tags.2.It Is made of polyurethane. 3.Features: Good flexibility, Aging resistance, Long life.Ear tag applicator, Metal injector, Plastic steel, Milk can, Thermometer, Veterinarian injector pin, Water drinker, and so on.ISO Certified Cattle Ear Tag