The ASG ULTRAIR High Power Airsoft Gas (Red) is a high-performance propellant designed to enhance the performance of gas blowback airsoft guns, particularly in colder conditions. With a pressure rating of 178 psi at 25°C (77°F), this red gas ensures consistent power and reliability during winter gameplay. Packaged in a 570 ml bottle, it features a durable metal nozzle for efficient refilling. Please note, due to its higher pressure, this gas is not recommended for use in airsoft guns with plastic slides, as it may cause damage. Always consider your equipment's specifications and operating temperature range when selecting propellant gases.