The Peerless-AV VESA 400 x 400mm Adapter Plates are designed to enhance the compatibility of your SmartMount and SmartMount LT series hardware. With a simple installation process that requires only four screws, these adapter plates allow you to mount a wider variety of screens. They support multiple VESA patterns including 400 x 400, 400 x 300, 400 x 200, 300 x 300, and 300 x 200, making them a versatile addition to your mounting solutions. The plates are compatible with various wall mounts such as SFL637, STL637, SPL737, SAL737, and SAL770, and can support a load capacity of up to 70.54 lb (32.00 kg). Measuring 6.62 x 5.31 x 0.20 inches, they are compact yet robust, ensuring a secure fit for your displays.