size:Fit pole diameters 2.5cm; General cart pole sea-cotton intercropping system， if any， can be added to the 3.2cm，material:plasticWhen we pushed the baby out， cell phones can only be put in our pocket， the call， or newsletters， micro ... ... We didn't clean the felt， and now the Smartphone area is quite large， a lot of people will hand to， but strollers baby hands using a mobile phone， will be in danger， the phone stand holder can help you， can be directly installed on the stroller， one can operate the phone.