Features: -Made of natural non-toxic rubber, safe and healthy, and It's very similar to the cow nipple. -The principle of design is negative pressure, the calf suck then the milk flows out, calf leave it will stop, no waste on milk, and reduce waste and dust into. -According to the characteristics of the calf physiological characteristics of the pacifier, makes the calf to complete the process of sucking. In the process of sucking can produce saliva to meet the calf's desire, It's animal welfare products, reduce the incidence of disease. -Screw on type, easy to install and operate, Used for calf sheep automatic feeding machine or feeding barrel replacement. -Can be used for all kinds of sheep lamb calf milk feeding buckets. Description: -Rubber feeding nipples/calf feeding bottles/Milk feeding nipples -TPE feeding nipples for animal. -Very soft high flexibility. -Professionally produce various feeding nipple for animals.. Specification: - Material: Rubber - Color: Red - Size: 6.2x3cm/ 2.44x1.18inch Package Included: 5/ 10 Rubber feeding nipples kindly Notice: Please allow 1-2mm error due to manual measurement. Please make sure you do not mind before you bid. The colors may have difference due to different display. thank you for your understanding!