Specifications: Material: ABS conductive silicone Breast pump inner diameter: 3.5 cm Package contents: 1 x pair of nipple teats. 1 x host. ► Friendly tips: 1. Please allow for slight variations due to manual measurement. 2. Colours may appear slightly different due to the colour representation of different monitors. ► High quality service. 1. Your package and personal information will be sent and treated strictly confidential. Place in a sealed bag, discreet postage. 2. After receiving our products, if you are not 100% satisfied with the quality or affected, please contact us, we will try our best to solve it.