Kee Lite® Structural Slip-On Pipe Fittings A Lightweight Alternative to Steel Structures With an Aesthetic Look and Design Since 1934, Kee Klamp has been dedicated to providing the world with a versatile, economical, and durable method of building tubular structures. Kee fittings are available in more countries, more styles, more sizes, and more colors than any other brand of structural fitting. Lightweight and Corrosion Resistant Kee Lite fittings are made from high grade Aluminum Silicon Magnesium alloy (A356-T6) which provide for a lightweight, corrosion resistant, and strong alternative for fabrication of pipe structures. Due to the superior corrosion resistance, Kee Lite fittings have an extremely low maintenance in outdoor settings. Kee Lite fittings are only one-third the weight of our iron fittings, with about 90% of comparable tensile strength.