Product Name: Best Quality Veterinary Crayon Animal Estrus Detection Model NO.: Maker 10 Type: Cow Application: Animals/Livestock Size: Small Life Cycle: <10 Years Age: New Living Environment: Temperate Zone Trademark: Hornta Transport Package: Paper Carton Origin: China HS Code: 9609900000 Product Description Caryon for AnimalsApplicable: Dairy cow,Pig,Sheep and so onUse: Detect estrusof animalsSpecifications: 60g / piece 24 pieces / carton 432pieces/Paper boxColors: red, orange, green, blueInstruction:Draw a long mark on the tail of the animal. After the animal is mounted by the other animals, the mark on the back will be rubbed, Through the color change to judge whether the animal is in estrusOur customer Service:1.Reply you inquiry in 24Hrs.2.Feedback of complaint in 24Hrs.3.OEM/ODM are welcomed.4.Short delivery time.5. We can process products according to customers' drawing or requirement.