Thin Walled Black Silicone Tunnels - 11/16" - 18mm - Sold As a Pair Made of Silicone Sold as a pair. Soft and Flexible. Wearable Area is 8mm long 11/16" - 18mm You can return this item for any reason and get a full refund: no shipping charges. The item must be returned in new and unused condition. Go to Your Orders to start the return Print the return shipping label Ship it!