Description Our structural shims are designed for precise installation of door and window frames, ensuring optimal load support and leveling. Made from solid plastic, these shims are for use with glass panels and aluminum frames. Simply place the shims between the frame and the wall to achieve the desired alignment and stability. Ideal for both residential and commercial applications, these shims provide a reliable solution for any installation project. Features -Color:Multi -Material:Plastic -Size:6.00X4.00X1.10cm/2.36X1.57X0.43in -Size:6.00X4.00X0.50cm/2.36X1.57X0.20in -Size:6.00X4.00X1.50cm/2.36X1.57X0.59in -Size:6.00X4.00X0.30cm/2.36X1.57X0.12in -Strong loadbearing capacity: these structural shims are designed to support heavyduty doors and windows, ensuring stability and safety in any installation -Easy diy installation: with userfriendly design, these shims can be easily installed by anyone, making them for diy projects and quick fixes -Durable and longlasting: made from plastic, these shims are built to last, providing reliable support for years without wear and tear -Versatile sizes available: available in multiple sizes, these shims can be used for various door and window dimensions, offering flexibility in application -Vibration and noise reduction: these shims help to reduce vibrations and noise, enhancing the comfort and quietness of your living spacePackage list: 40 x spacers