Just add each style to your cart separately. For example, to order both styles: click 'Tail Right', change the quantity if desired, then "Add to cart", this will take you to the View Cart page. To add the other option, click "Continue shopping", which will take you back to the product page, where you can choose 'Tail Left', the quantity, then "Add to cart". When done shopping, click 'Proceed to Checkout.'