Colibri Premium Butane is highly recommended by Iolite. Premium butane makes a big difference. Quality fuel doesnt just keep your flame burning, it keeps your lighter in proper working condition. Colibri Premium Butane reduces contaminants that cause clogged burner valves, misfires and malfunctions. Our butane is developed to safeguard your lighter against costly repairs and damages. Recommended for all refillable butane lighters. Specifications 3.04 Fl. Oz / 50 Grams