.040 is ideal for repairs of major connectors on orthopedic appliances. Diamond drawn to exact tolerances for optimal resilience for every orthodontic application. Wire has excellent working characteristics, accepts severe bends with minimal fracturing and is easily soldered. Features: 1.Adjustable Flame2.Electronic Instant Ignition System3.Efficient, hands-free, freestanding design4.Refillable 26 grams or 1.58fl. oz.