Features: 1.The product is made of high-quality rubber, which is soft, wear-resistant and bite-resistant, and has a longer service life. 2.Food grade rubber, non-toxic, odorless, easy to clean, healthy and hygienic. 3.Bionic design, it can be installed in the feeding bottle and other equipment, so that the calf can feel the pleasure of sucking milk in the mother. 4.Natural speed sucking helps to produce a large amount of saliva and help digestion; intermittent feeding avoids foreign body pneumonia. 5.The product is suitable for all kinds of small animals, such as calves. Specification: Feature: The product is made of high-quality rubber, which is soft, wear-resistant and bite-resistant, and has a longer service life. Food grade rubber, non-toxic, odorless, easy to clean, healthy and hygienic. Bionic design, it can be installed in the feeding bottle and other equipment, so that the calf can feel the pleasure of sucking milk in the mother. The product is suitable for all kinds of small animals, such as calves. Natural speed sucking helps to produce a large amount of saliva and help digestion; intermittent feeding avoids foreign body pneumonia. Specification: Model: HL-MP76 Product Material: Rubber Product color: Red Length: 10cm / 3.9in Diameter: 3.6cm / 1.4in Suitable animal type: Calf Package list: 5 * Calf Milk Nipple Note: The actual product color may deviate from the photo due to light. There may be a slight deviation in the measurement of product.