Check the listing for details. Black Replacement 6.5 Ft. Talk Box Tube for Dunlop/Heil HT-1 with a 5/8-inch OD. Condition: New. Listed at 17.00 USD. This listing is for a Black Replacement 1/2" ID, 5/8" OD X 6.5 ft tube for your Dunlop/Hei HT-1Talk Box. It is made of Non-Toxic/ BPA Free PVC Tubing. It is flexible like the original, unlike the tubing from your local do-it-yourself store.This can also be used on any Talk Box that uses a 5/8-inch OD tube. You just purchased a used Talk Box. You don't want to use the NASTY tube that came with it, Do You? Although this is a New product, as with anything you are going to use in this manner, Wash and sterilize this item before you put it in your mouth. The Talk Box pictured is not for sale or included in the listing. It is for reference purposes only. It's sad that I need to make this a part of my listing. Due to the nature of this product, Returns are not accepted unless the package is unopened. Please see my other listings for talk box adapters.