The ZKSW400DC is a piston kit designed for folding doors, specifically tailored for double service or folding doors with a maximum weight of 400 kg each. Here are its standout features: - Extendable and durable aluminum swing arms provide superior performance, even on doors weighing less than the recommended maximum. - Offers a long useful life with minimal maintenance requirements, thanks to its robust system design. - Suitable for entry gates made of steel, wood, vinyl, and with a tubular shape, making it versatile for various applications such as residential areas, patios, farms, factories, hotels, shopping centers, and more. - Easy installation with complete mounting hardware and straightforward instructions included, requiring no additional soldering work or high-voltage electrical connections. The entire installation process typically takes only a few hours. Experience seamless and reliable operation with the ZKSW400DC piston kit for folding doors.