• Each bottles contain very fine silica powder that, when squeezed, will release very realistic powdered smoke
• NO FLAMES REQUIRED
• Silica powder has a particle size of .007 microns and a large surface area to precisely follow air flow
• Non toxic smoke is perfect for quick visual inspection of air balancing equipment, air purification and ventilation or direction of air flow
• Each bottle contains roughly 200 puffs of silica powder