The portable AC window vent kit features a flat-mouth design that fits most mainstream portable air conditioner models, enabling seamless connection between exhaust hoses and. The gray AC window adapter comes in a standard 5.91-inch size, making it easy to verify compatibility with portable air conditioner exhaust hoses before installation. Made of lightweight plastic, this portable AC wind adapter weighs only about 160 grams, making it effortless to install and adjust as needed. This portable AC window vent kit is crafted from plastic material, ensuring long-lasting use even with regular assembly and disassembly. The AC window adapter's tight interface design helps minimize air leakage at connections, enhancing the exhaust efficiency of portable air conditioners.