1.8% Pyrethrin 10% Piperoynl Butoxide-very strong? UNSCENTED? Fits all Cam Spring Action (CSA) Dispensers ? 1 Can will dispense for 30 Days at 7 1/2 minute Intervals or 60 Days at 15 Minute Intervals? 1 Can treats up to 6000 Cubic Feet of Unobstructed Space. ? Ideal for use in Barns, Garages, Sheds, Kennels, Mudrooms and several other areas.