Small-Size #08B YIHUA 08B Soldering Iron Tip Brass Wire Ball Cleaner with Rosin Resin. Please kindly note that rosin resin is inside the bottom of tip cleaner can. CAUTION: when using the brass wool tip cleaner (rosin-inside), ensure there is adequate ventilation, DO NOT inhale the fume generated or consume the solid-state rosin, DO NOT allow your skin and eyes to get in direct contact with the rosin.