In a pack of 20, these replacement optic inserts finned corks are the solution to ensure that your speed pourers stop leaking spirit from the bottles. Made from rubber, they fit 70cl up to 1.5ltr bottles, ensuring a tight fit every time. Flexible for ease when taking out the inverted bottle neck. These inserts are designed for 70cl to 1.5Ltr bottles. The convenient bulk pack of 20 ensures you always have spares on hand to keep your speed pourers functioning. They are made from durable and flexible rubber for easy attachment and removal, ensuring a tight, leak-proof fit. These inserts help to eliminate leaks, keeping your spirits from spilling and reducing wastage, while maintaining a secure seal for efficient pouring and preserving your beverages.