These professional grade smoke bombs are the strongest on the market containing permethrin at 13.25% w/w. These fast acting smoke bombs will kill all poultry red mite in the enclosed targeted area without staining, they are low odour and work perfectly as part of a comprehensive treatment of red mite. After lighting, it releases permethrin smoke, which fumigates the treatment area, killing all red mites. Once dispersed the smoke leaves no residue so will not taint any surfaces. One 3.5g smoke bomb will treat an area around 2m x 2m x 1.8m. A twin pack of these smoke bombs will treat an area around 4m x 2m x 2m. For larger treatment areas use more smoke bombs, equally placed around the area.