Keeney white polypropylene extension coupling allows for slip joint connections, creating a quick and easy installation process for your next under-sink project. This coupling can be used with both 1-1/2 In. and 1-1/4 In. tube connections. The included heavy-duty washers protect against leaks for a problem-free connection, so you can install with confidence. Keeney is a leading manufacturer and distributor of tubular drainage products. Founded in 1923, the Keeney product line includes under-sink drainage, quarter-turn valves, bath drains, toilet repair parts and more.