The adjustable flow Glo-Brush lets you apply a thin layer of powder to any surface quickly and without waste. The Glo-Brush has a refillable powder reservoir and a cover to protect bristles. Especially useful in training for cross-contamination, bio-terrorism preparedness training and PPE doffing. This product comes with The Glo Germ Powder in a 4 ounce (by volume) bottle (1.9 oz by weight)