The dual-flame butane lighter insert is designed to seamlessly fit with all classic Zippo lighters. With the push of a button, it emits a single, adjustable bright blue flame. This rugged and durable insert is built to last and even retains the iconic Zippo "click sound". It comes with a 2-year manufacturer's warranty and can provide up to 100, 5-second lighters when completely filled with a 1-inch flame height. Made in the USA, this wind-proof insert features a push-button piezo ignition and is covered by a 2-year manufacturer's warranty. Please note, this product is intended for legal herbal use only and is not intended for tobacco.