Anti-slip Snap: Tired of the traditional lighter inserts that often come loose and shift upwards? This upgraded version with a non-slip snap design can securely stay inside the casing, allowing you to smoothly operate your lighter. Extended Fuel Endurance: This lighter insert is equipped with a metal lighter gasket and a sealing top cover, which can slow down fuel evaporation and tested to store fuel longer than traditional inserts. The flip-open refueling design at the bottom makes it easier to refill lighter fluid and less likely to dirty hands compared to traditional inserts. Windproof Design: A 16-hole windproof shield ensures your lighter works virtually everywhere. Dual auxiliary grinding wheels, designed ergonomically, provide more comfortable and efficient ignition. Applicable Models: The dimensions of the lighter insert are 2.03 x 1.4 x 0.47 inches, suitable for Classic and Armor pocket lighters. The fuel is lighter fluid. Durable: All metal construction is built to last. A great insert replacement for regular pocket lighter.Durable: All metal construction is built to last. A great insert replacement for regular pocket lighter.