Fittings designed to allow for indoor and outdoor modular projects Unique slip-on style connection type that needs only an Allen wrench or hex key for a secure connection This fitting is designed to work with SteelTek 1-1/4in pipe Stainless steel screws included with each fitting 5/16 in. (8mm) Allen wrench or hex key (not included) tightens screws in fitting which allows for easy removal or modification of a project Galvanized steel construction with zinc coating for durable performance and corrosion resistance Use a steel-based spray paint to easily change the color of your project Able to operate in temperatures ranging from -20C to 300C Material meets ASTM A-197