How to set gap between Unselected items in Xamarin.Forms Carousel?

public partial class KBSolutionPage  : ContentPage
{
    public KBSolutionPage()
    {
        InitializeComponent();
 
        // Create an instance of carousel control
 
        SfCarousel sfCarousel = new SfCarousel();
 
        // To get the view of carousel , need to assign the ItemHeight and ItemWidth 
 
        if (Device.OS == TargetPlatform.Android)
        {
            sfCarousel.ItemWidth = 170;
            sfCarousel.ItemHeight = 250;
        }
        if (Device.OS == TargetPlatform.iOS)
        {
            sfCarousel.ItemWidth = 150;
            sfCarousel.ItemHeight = 300;
        }
        //Offset property is used to give gap between the unselected items
 
        sfCarousel.Offset = 40;
 
        var carouselModel = new List<CarouselModel> {
            new CarouselModel ("image1.png"),
            new CarouselModel ("image2.png"),
            new CarouselModel ("image3.png"),
            new CarouselModel ("image4.png"),
            new CarouselModel ("image5.png")
        };
 
        // Template initialization
 
        var carouselModelDataTemplate = new DataTemplate(() =>
        {
            var grid = new Grid();
            var nameLabel = new Image();
            nameLabel.SetBinding(Image.SourceProperty, "Image");
            grid.Children.Add(nameLabel);
            return grid;
        });
 
        //assign the collection of custom view to carousel's collection
 
        sfCarousel.ItemTemplate = carouselModelDataTemplate;
        sfCarousel.DataSource = carouselModel;
 
        this.Content = sfCarousel;
    }
}
 
public class CarouselModel 
{
    public CarouselModel(string imagestr)
    {
        Image = imagestr;
    }
    private string _image;
 
    public string Image
    {
        get { return _image; }
        set { _image = value; }
    }
}