Blue Rhino SkeeterVac provides the exclusive Fine Tune Bait Block with adjustable octenol output to allow you to customize the mosquito attractant to your specific landscape environment. The Bait Blocks are designed to time-release the right amount of attractant over a 60-day period (outdoor conditions may vary). This item is compatible with the following SkeeterVac models: ; SV27 ; SV35 ; SV3000 ; and SV5000 .