The plastic square caps are specifically designed to fit 40x40mm square tubes with a wall thickness of 1-3mm. These caps serve as protective covers for the ends of the tubes, providing a clean and polished look. Made from high-quality plastic in a white color, these caps offer durability and a sleek appearance. They are easy to install and ensure a secure fit, effectively preventing dust, debris, and moisture from entering the tubes. Whether for industrial applications, construction projects, or DIY crafts, these white plastic square caps are a versatile solution for protecting and enhancing your square tube assemblies.