Keeney’s 10-pack of sink extension tubes has the contractor in mind so you have enough parts on hand to get the job done. Each extension tube is 12-inches long with a 1-1/2-in inlet, including leak-free TPR washers that eliminate call backs. They’re constructed of durable white polypropylene and designed for slip joint connection for easy installation at the work site. All necessary nuts and washers are included. You can install with confidence knowing Keeney stands by this product.