Keeney's 400WK P-Trap is designed to prevent sewer gas from escaping from a plumbing fixture or drain in a kitchen or bathroom. It has a 1-1/2 in. inlet and outlet with a reducing washer for 1-1/4 in. connections, allowing for easy slip joint installation. The durable white polypropylene construction offers long-lasting use. This product includes all the necessary nuts and washers for installation. You can install it with confidence knowing this product was made in the USA and Keeney stands by it with a limited warranty.