Check the listing for details. Johnson Structo-Cast 3 Inch Plastic Line Level Set. Color: Gray & Black, Condition: New, Made in United States. Listed at 8.49 USD. The Johnson Structo-Cast 3 Inch Plastic Line Level Set is a must-have for any DIY enthusiast or professional contractor. This portable tool is perfect for measuring and leveling surfaces with ease. Made by Johnson Level & Tool Mfg Co Inc in the United States, this level set is designed to provide accurate and reliable results. The set comes with a 1-year manufacturer warranty and is made of durable plastic material in gray and black color. Measuring 3 inches in length, it features a line/surface level type and is ideal for use in measuring and layout projects. Whether you are working on a home renovation project or building a new structure, this line level set will help you achieve precise and level results.